Service Manual2008 Captiva TROUBLE CODE DIAGNOSIS

Captiva

TROUBLE CODE DIAGNOSIS

Clearing Trouble Codes

Notice : To prevent Engine Control Module (ECM) damage, the key must be OFF when disconnecting or reconnecting the power to the ECM (for example battery cable, ECM pigtail connector, ECM fuse, jumper cables, etc.).When the ECM sets a Diagnostic Trouble Code (DTC), the Malfunction Indicator Lamp (MIL) lamp will be turned on only for type A, B and E but a DTC will be stored in the ECM's memory for all types of DTC. If the problem is intermittent, the MIL will go out after 10 seconds if the fault is no longer present. The DTC will stay in the ECM's memory until cleared by scan tool. Removing battery voltage for 10 seconds will clear some stored DTCs.

DTCs should be cleared after repairs have been completed. Some diagnostic tables will tell you to clear the codes before using the chart. This allows the ECM to set the DTC while going through the chart, which will help to find the cause of the problem more quickly.

Diagnostic Trouble Codes

DTC	Function	Error Type	Illuminate MIL	Illuminate SVS
P0030	HO2S Heater Control Circuit Sensor 1	E	YES	NO
P0031	HO2S Heater Control Circuit Low Voltage Sensor 1	E	YES	NO
P0032	HO2S Heater Control Circuit High Voltage Sensor 1	E	YES	NO
P0036	HO2S Heater Control Circuit Low Voltage Sensor 1	E	YES	NO
P0037	HO2S Heater Control Circuit Low Voltage Sensor 2	E	YES	NO
P0038	HO2S Heater Control Circuit High Voltage Sensor 2	E	YES	NO
P0106	Manifold Absolute Pressure (MAP) Sensor Performance	E	YES	NO
P0107	Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage	E	YES	NO
P0108	Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage	E	YES	NO
P0112	Intake Air Temperature (IAT) Sensor Circuit Low Voltage	E	YES	NO
P0113	Intake Air Temperature (IAT) Sensor Circuit High Voltage	E	YES	NO
P0116	Engine Coolant Temperature (ECT) Sensor Performance	E	YES	NO
P0117	Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage	E	YES	NO
P0118	Engine Coolant Temperature (ECT) Sensor Circuit High Voltage	E	YES	NO
P0121	Throttle Position (TP) Sensor 1 Performance	A	YES	NO
P0122	Throttle Position (TP) Sensor 1 Circuit Low Voltage	A	YES	NO
P0123	Throttle Position (TP) Sensor 1 Circuit High Voltage	A	YES	NO
P0125	Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control	E	YES	NO
P0131	HO2S Circuit Low Voltage Sensor 1	A	YES	NO
P0132	HO2S Circuit High Voltage Sensor 1	A	YES	NO
P0133	HO2S Circuit Slow Response Sensor 1	E	YES	NO
P0134	HO2S Circuit Sensor 1	A	YES	NO
P0137	HO2S Circuit Low Voltage Sensor 2	A	YES	NO
P0138	HO2S Circuit High Voltage Sensor 2	A	YES	NO
P0140	HO2S Circuit Sensor 2	A	YES	NO
P0201	Injector 1 Control Circuit	E	YES	NO
P0202	Injector 2 Control Circuit	E	YES	NO
P0203	Injector 3 Control Circuit	E	YES	NO
P0204	Injector 4 Control Circuit	E	YES	NO
P0221	Throttle Position (TP) Sensor 2 Performance	A	YES	NO
P0222	Throttle Position (TP) Sensor 2 Circuit Low Voltage	A	YES	NO
P0223	Throttle Position (TP) Sensor 2 Circuit High Voltage	A	YES	NO
P0261	Injector 1 Control Circuit Low Voltage	E	YES	NO
P0262	Injector 1 Control Circuit High Voltage	E	YES	NO
P0264	Injector 2 Control Circuit Low Voltage	E	YES	NO
P0265	Injector 2 Control Circuit High Voltage	E	YES	NO
P0267	Injector 3 Control Circuit Low Voltage	E	YES	NO
P0268	Injector 3 Control Circuit High Voltage	E	YES	NO
P0270	Injector 4 Control Circuit Low Voltage	E	YES	NO
P0271	Injector 4 Control Circuit High Voltage	E	YES	NO
P0300	Engine Misfire Detected	A or E	Blink(A), YES	NO
P0301	Cylinder 1 Misfire Detected	A or E	Blink(A), YES	NO
P0302	Cylinder 2 Misfire Detected	A or E	Blink(A), YES	NO
P0303	Cylinder 3 Misfire Detected	A or E	Blink(A), YES	NO
P0304	Cylinder 4 Misfire Detected	A or E	Blink(A), YES	NO
P0324	Knock Sensor (KS) Module Performance	E	YES	NO
P0327	Knock Sensor (KS) Circuit Low Frequency	E	YES	NO
P0328	Knock Sensor (KS) Circuit High Frequency	E	YES	NO
P0335	Crankshaft Position (CKP) Sensor Circuit	A	YES	NO
P0336	Crankshaft Position (CKP) Sensor Performance	A	YES	NO
P0337	Crankshaft Position (CKP) Sensor Circuit Low Duty Cycle	A	YES	NO
P0338	Crankshaft Position (CKP) Sensor Circuit High Duty Cycle	A	YES	NO
P0340	Camshaft Position (CMP) Sensor Circuit	A	YES	NO
P0341	Camshaft Position (CMP) Sensor Performance	A	YES	NO
P0342	Camshaft Position (CMP) Sensor Circuit Low Voltage	A	YES	NO
P0343	Camshaft Position (CMP) Sensor Circuit High Voltage	A	YES	NO
P0403	Exhaust Gas Recirculation (EGR) Solenoid Control Circuit	E	YES	NO
P0404	Exhaust Gas Recirculation (EGR) Open Position Perfermance	E	YES	NO
P0405	Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage	E	YES	NO
P0406	Exhaust Gas Recirculation (EGR) Position Sensor Circuit High Voltage	E	YES	NO
P0420	Catalyst System Low Efficiency	E	YES	NO
P0443	Evaporative Emission (EVAP) Purge Solenoid Control Circuit	E	YES	NO
P0458	Evaporative Emission (EVAP) Purge Solenoid Control Circuit Low Voltage	E	YES	NO
P0459	Evaporative Emission (EVAP) Purge Solenoid Control Circuit High Voltage	E	YES	NO
P0461	Fuel Level Sensor 1 Performance	E	YES	NO
P0462	Fuel Level Sensor 1 Circuit Low Voltage	E	YES	NO
P0463	Fuel Level Sensor 1 Circuit High Voltage	E	YES	NO
P046C	Exhaust Gas Recirculation (EGR) Position Sensor Performance	E	YES	NO
P0489	Exhaust Gas Recirculation (EGR) Solenoid Control Circuit Low Voltage	E	YES	NO
P0490	Exhaust Gas Recirculation (EGR) Solenoid Control Circuit High Voltage	E	YES	NO
P049D	Exhaust Gas Recirculation (EGR) Position Not Learned	E	YES	NO
P0506	Idle Speed Low	E	YES	NO
P0507	Idle Speed High	E	YES	NO
P0513	Immobilizer Key Incorrect	C	NO	YES
P0520	Engine Oil Pressure (EOP) Switch Circuit	C	NO	YES
P0532	Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage	C	NO	YES
P0533	Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage	C	NO	YES
P0562	System Voltage Low	E	YES	NO
P0563	System Voltage High	E	YES	NO
P0571	Brake Switch Circuit 1	C	NO	YES
P0601	Control Module Read Only Memory (ROM)	A	YES	NO
P0604	Control Module Random Access Memory (RAM)	A	YES	NO
P0606	Control Module Internal Performance	A	YES	NO
P0615	Starter Relay Control Circuit	C	NO	YES
P0616	Starter Relay Control Circuit Low Voltage	C	NO	YES
P0617	Starter Relay Control Circuit High Voltage	C	NO	YES
P0621	Generator L - Terminal Circuit	E	YES	NO
P0627	Fuel Pump Relay Control Circuit Open	C	NO	YES
P0628	Fuel Pump Relay Control Circuit Low Voltage	C	NO	YES
P0629	Fuel Pump Relay Control Circuit High Voltage	C	NO	YES
P0630	VIN Not Programmed or Mismatched Engine Control Module (ECM)	A	YES	NO
P0633	Immobilizer Key Not Programmed	C	NO	YES
P0638	Throttle Actuator control (TAC) Command Performance	A	YES	NO
P0645	Air Conditioning (A/C) Clutch Relay Control Circuit	C	NO	YES
P0646	Air Conditioning (A/C) Clutch Relay Control Circuit Low Voltage	C	NO	YES
P0647	Air Conditioning (A/C) Clutch Relay Control Circuit High Voltage	C	NO	YES
P0689	Engine Controls Ignition Relay Feedback Circuit Low Voltage	A	YES	NO
P0691	Cooling Fan Relay 1 Control Circuit Low Voltage	C	NO	YES
P0692	Cooling Fan Relay 1 Control Circuit High Voltage	C	NO	YES
P0693	Cooling Fan Relay 2 Control Circuit Low Voltage	C	NO	YES
P0694	Cooling Fan Relay 2 Control Circuit High Voltage	C	NO	YES
P0700	Transmission Control Module (TCM) Requested MIL Illumination	A	YES	NO
P0703	Brake Switch Circuit 2	C	NO	YES
P0800	Active Transfer Case (ATC) Control Module Requested MIL Illumination	A	YES	NO
P0833	Clutch Pedal Switch 2 Circuit	C	NO	YES
P0850	Park/Neutral Position (PNP) Switch Circuit	C	NO	YES
P1138	HO2S Circuit High Voltage During Dedel Fuel Cut-Off (DFCO) Sensor 2	E	YES	NO
P1551	Throttle Control Lower Position Not Reached During Learn	A	YES	NO
P1631	Immobilizer Enable Signal Not Correct	C	NO	YES
P1682	Ignition 1 Switch Circuit 2	A	YES	NO
P1845	Torque Limit Management	A	YES	NO
P2066	Fuel Level Sensor 2 Performance	E	YES	NO
P2067	Fuel Level Sensor 2 Circuit Low Voltage	E	YES	NO
P2068	Fuel Level Sensor 2 Circuit High Voltage	E	YES	NO
P2096	Post Catalyst Fuel Trim System Low Limit	E	YES	NO
P2097	Post Catalyst Fuel Trim System High Limit	E	YES	NO
P2100	Throttle Actuator Control (TAC) Motor Control Circuit	A	YES	NO
P2101	Throttle Actuator Position Performance	A	YES	NO
P2107	Throttle Actuator Control (TAC) Module Internal Circuit	A	YES	NO
P2119	Throttle Closed Position Performance	A	YES	NO
P2121	Accelerator Pedal Position (APP) Sensor 1 Performance	A	YES	NO
P2122	Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage	A	YES	NO
P2123	Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage	A	YES	NO
P2127	Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage	A	YES	NO
P2128	Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage	A	YES	NO
P2135	Throttle Position (TP) Sensor 1-2 Correlation	A	YES	NO
P2138	Accelerator Pedal Position (APP) Sensor 1-2 Correlation	A	YES	NO
P2176	Throttle Control Lower Position Not Learned	A	YES	NO
P2177	Fuel Trim System Lean at Cruise or Accel	E	YES	NO
P2178	Fuel Trim System Rich at Cruise or Accel	E	YES	NO
P2187	Fuel Trim System Lean at Idle	E	YES	NO
P2188	Fuel Trim System Rich at Idle	E	YES	NO
P2191	Fuel Trim System Lean at Higher Load	E	YES	NO
P2192	Fuel Trim System Rich at Higher Load	E	YES	NO
P2231	HO2S Signal Circuit Shorted to Heater Circuit Sensor 1	A	YES	NO
P2232	HO2S Signal Circuit Shorted to Heater Circuit Sensor 2	A	YES	NO
P2270	HO2S Signal Stuck Lean Sensor 2	E	YES	NO
P2271	HO2S Signal Stuck Rich Sensor 2	E	YES	NO
P2533	Ignition 1 Switch Circuit	C	NO	YES
P2536	Ignition Accessory Switch Circuit	C	NO	YES
P2636	Fuel Pump 2 Flow Insufficient	E	YES	NO
U0073	Control Module Communication Bus Off	C	NO	YES
U0101	Lost Communication with TCM	C	NO	YES
U0102	Lost Communciation with Transfer Case Control Module	C	NO	YES
U0121	Lost Communciation with ABS Control Module	C	NO	YES
U0140	Lost Communication with Body Control Module	C	NO	YES
U0402	Invalid Data Received from Transmission Control Module	C	NO	YES
U0415	Invalid Data Received from Anti-Lock Brake System Control Module	C	NO	YES
U0422	Invalid Data Received from Body Control Module	C	NO	YES
U1405	Invalid Data Received from Cruise Control Switch	C	NO	YES
U2101	Maximum List of CAN Control Modules Not Programmed	C	NO	YES

Diagnostic Trouble Code (DTC) P0030

HO2S Heater Control Circuit Sensor 1

Circuit Description

Heated oxygen sensors are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the vehicle is first started, the engine control module (ECM) operates in an open loop mode, ignoring the HO2S signal voltage when calculating the air fuel ratio. The ECM supplies the HO2S with a reference voltage of about 0.45V. The HO2S generates a voltage within a range of 0~1V that fluctuates above and below bias voltage once in closed loop. A high HO2S voltage output indicates a rich fuel mixture. A low HO2S voltage output indicates a lean mixture. Heating elements inside the HO2S minimize the time required for the sensors to reach operating temperature, and then provide an accurate voltage signal. The ECM controls the HO2S heater low control circuit with a low side driver. The HO2S heater diagnostic monitors the current draw through the HO2S low side driver when the engine is running. If the ECM detects that the HO2S heater low control circuit current exceeds a calibrated amount, this DTC will set.

Conditions for Running the DTC

Engine is running.
Battery voltage is 10.7 - 16.1 V.

Conditions for Setting the DTC

Heater voltage is 2.344 - 3.594 V and reating off.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

DTC P0030 - HO2S Heater Control Circuit Sensor 1

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Start the engine. Allow the engine to idle at operating temperature. Observe the HO2S heater current parameter with a scan tool. Is the amperage within the specified values?	0.25~0.85A	Go to Step 3	Go to Step 4
3	Observe the Freeze Frame / Failure Records for this DTC. Turn off the ignition for 30 seconds. Start the engine. Operate the vehicle within the conditions for setting the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	-	Go to Step 4	Go to "Intermittents"
4	Turn OFF the ignition. Disconnect the HO2S connector. Start the engine. Allow the engine to idle at operating temperature. Observe the DTC Info parameter with a scan tool for at least 30 seconds. Did the DTC fail this ignition?	-	Go to Step 5	Go to Step 6
5	Test the HO2S heater low control circuit for a short to voltage. Did you find and correct the condition?	-	Go to Step 10	Go to Step 7
6	Test for an intermittent and for a poor connection at the harness connector of the HO2S. Did you find and correct the condition?	-	Go to Step 10	Go to Step 8
7	Test for an intermittent and for a poor connection at the harness connector of the ECM. Did you find and correct the condition?	-	Go to Step 10	Go to Step 9
8	Replace the HO2S. Did you complete the replacement?	-	Go to Step 10	-
9	Replace the ECM. Did you complete the replacement?	-	Go to Step 10	-
10	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the conditions for setting the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/ Failure Records. Does the DTC run and pass?	-	Go to Step 11	Go to Step 2
11	Check if any additional DTCs are set. Are any DTCs displayed that have not been diagnosed?	-	Go to Applicable DTC table	System OK

Diagnostic Trouble Code (DTC) P0031

HO2S Heater Control Circuit Low Voltage Sensor 1

Circuit Description

The DTC P0031 monitors the HO2S heater circuit current. The heater is powered through the ignition switch and is grounded through the ECM heater control. The ECM commands the heater ON by grounding the heater control circuit. The HO2S sensor must be at operating temperature in order to accurately measure the oxygen content of the exhaust gas. The heater allows the HO2S to reach operating temperature quickly.

Conditions for Running the DTC

Engine is running.
Battery voltage is 10.7 - 16.1 V.

Conditions for Setting the DTC

Heater voltage is less than 2.344 V and heating is off.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

Diagnostic Aids

An intermittent malfunction may be caused by a problem in the HO2S electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to "Intermittent".

If a DTC P0031 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set.

DTC P0031 - HO2S Heater Control Circuit Low Voltage Sensor 1

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Turn OFF the ignition. Disconnect the HO2S electrical connector. Turn ON the ignition, leaving the engine OFF. Probe the harness side of the ignition feed circuit of the HO2S heater at the connector using a test lamp connected to ground. Does the test lamp illuminate?	-	Go to Step 3	Go to Step 7
3	Measure the resistance of the heater element of the HO2S. Connect a DVM between terminal 2 and terminal 4, on the sensor side, of the HO2S connector. Is the HO2S heater resistance within the specified range?	4.5~5.7Ω	Go to Step 4	Go to Step 9
4	Connect a test lamp from B+ to the ECM side of the HO2S heater control circuit. Start the engine. Did the test lamp illuminate only when the engine was running?	-	Go to "Diagnostic Aids"	Go to Step 5
5	Turn OFF the ignition. Connect the HO2S electrical connector. Disconnect the ECM electrical connector. Turn ON the ignition, leaving the engine OFF. Measure the voltage from the harness side of the HO2S heater control circuit at the ECM. Is the voltage more than the specified value?	10V	Go to Step 8	Go to Step 6
6	Repair the open circuit or the short to ground in the HO2S heater control circuit. Did you complete the repair?	-	Go to Step 11	-
7	Repair the open in the ignition positive voltage circuit. Did you complete the repair?	-	Go to Step 11	-
8	Check for a faulty connection at the ECM and HO2S electrical connectors. Repair as necessary. Was a repair necessary?	-	Go to Step 11	Go to Step 10
9	Replace the HO2S. Did you complete the replacement?	-	Go to Step 11	-
10	Replace the ECM. Did you complete the replacement?	-	Go to Step 11	-
11	Start the engine. Operate the vehicle within the conditions for setting the DTC as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 12	Go to Step 2
12	With a scan tool, observe the stored information. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Applicable DTC table	System OK

Diagnostic Trouble Code (DTC) P0032

HO2S Heater Control Circuit High Voltage Sensor 1

Circuit Description

The DTC P0032 monitors the HO2S heater circuit current. The heater is powered through the ignition switch and is grounded through the ECM heater control. The ECM commands the heater ON by grounding the heater control circuit. The HO2S sensor must be at operating temperature in order to accurately measure the oxygen content of the exhaust gas. The heater allows the HO2S to reach operating temperature quickly.

Conditions for Running the DTC

Engine is running.
Battery voltage is 10.7 - 16.1 V.

Conditions for Setting the DTC

Heater voltage is than 3.594 V and heating on.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

Diagnostic Aids

An intermittent malfunction may be caused by a problem in the HO2S electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to "Intermittent".

If a DTC P0032 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set.

DTC P0032 - HO2S Heater Control Circuit High Voltage Sensor 1

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Measure the resistance of the heater element of the HO2S. Connect a DVM between terminal 2 and terminal 4, on the sensor side, of the HO2S connector. Is the HO2S heater resistance within the specified range?	4.5~5.7Ω	Go to Step 3	Go to Step 5
3	Turn OFF the ignition. Disconnect the HO2S and the ECM electrical connectors. Turn ON the ignition, leaving the engine OFF. Test the heater control circuit between the HO2S and the ECM for a short to voltage. Repair as necessary. Was a repair necessary?	-	Go to Step 7	Go to Step 4
4	Turn on the ignition, leaving the engine OFF. Using a scan tool, clear DTC. Operate the vehicle within the Freeze Frame conditions as specified. Does this DTC set?	-	Go to Step 6	Go to "Diagnostic Aids"
5	Replace the HO2S. Did you complete the replacement?	-	Go to Step 7	-
6	Replace the ECM. Did you complete the replacement?	-	Go to Step 7	-
7	Start the engine. Operate the vehicle within the conditions for setting the DTC as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 8	Go to Step 2
8	With a scan tool, observe the stored information. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Applicable DTC table	System OK

Diagnostic Trouble Code (DTC) P0036

HO2S Heater Control Circuit Bank 1 Sensor 2

Circuit Description

Conditions for Setting the DTC

Controler IC check the current and voltage of the output stage.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

DTC P0036 - HO2S Heater Control Circuit Sensor 2

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Start the engine. Allow the engine to idle at operating temperature. Observe the HO2S heater current parameter with a scan tool. Is the amperage within the specified values?	0.25~0.85A	Go to Step 3	Go to Step 4
3	Observe the Freeze Frame / Failure Records for this DTC. Turn off the ignition for 30 seconds. Start the engine. Operate the vehicle within the conditions for setting the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	-	Go to Step 4	Go to "Intermittents"
4	Turn OFF the ignition. Disconnect the HO2S connector. Start the engine. Allow the engine to idle at operating temperature. Observe the DTC Info parameter with a scan tool for at least 30 seconds. Did the DTC fail this ignition?	-	Go to Step 5	Go to Step 6
5	Test the HO2S heater low control circuit for a short to voltage. Did you find and correct the condition?	-	Go to Step 10	Go to Step 7
6	Test for an intermittent and for a poor connection at the harness connector of the HO2S. Did you find and correct the condition?	-	Go to Step 10	Go to Step 8
7	Test for an intermittent and for a poor connection at the harness connector of the ECM. Did you find and correct the condition?	-	Go to Step 10	Go to Step 9
8	Replace the HO2S. Did you complete the replacement?	-	Go to Step 10	-
9	Replace the ECM. Did you complete the replacement?	-	Go to Step 10	-
10	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the conditions for setting the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/ Failure Records. Does the DTC run and pass?	-	Go to Step 11	Go to Step 2
11	Check if any additional DTCs are set. Are any DTCs displayed that have not been diagnosed?	-	Go to Applicable DTC table	System OK

Diagnostic Trouble Code (DTC) P0037

HO2S Heater Control Circuit Low Voltage Sensor 2

Circuit Description

The DTC P0037 monitors the HO2S heater circuit current. The heater is powered through the ignition switch and is grounded through the ECM heater control. The ECM commands the heater ON by grounding the heater control circuit. The HO2S sensor must be at operating temperature in order to accurately measure the oxygen content of the exhaust gas. The heater allows the HO2S to reach operating temperature quickly.

Conditions for Setting the DTC

Controler IC check the current and voltage of the output stage.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

Diagnostic Aids

An intermittent malfunction may be caused by a problem in the HO2S electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to "Intermittent".

If a DTC P0037 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set.

DTC P0037 - HO2S Heater Control Circuit Low Voltage Sensor 2

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic (OBD) System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Turn OFF the ignition. Disconnect the HO2S electrical connector. Turn ON the ignition, leaving the engine OFF. Probe the harness side of the ignition feed circuit of the HO2S heater at the connector using a test lamp connected to ground. Does the test lamp illuminate?	-	Go to Step 3	Go to Step 7
3	Measure the resistance of the heater element of the HO2S. Connect a DVM between terminal 2 and terminal 4, on the sensor side, of the HO2S connector. Is the HO2S heater resistance within the specified range?	4.5~5.7Ω	Go to Step 4	Go to Step 9
4	Connect a test lamp from B+ to the ECM side of the HO2S heater control circuit. Start the engine. Did the test lamp illuminate only when the engine was running?	-	Go to "Diagnostic Aids"	Go to Step 5
5	Turn OFF the ignition. Connect the HO2S electrical connector. Disconnect the ECM electrical connector. Turn ON the ignition, leaving the engine OFF. Measure the voltage from the harness side of the HO2S heater control circuit at the ECM. Is the voltage more than the specified value?	10V	Go to Step 8	Go to Step 6
6	Repair the open circuit or the short to ground in the HO2S heater control circuit. Did you complete the repair?	-	Go to Step 11	-
7	Repair the open in the ignition positive voltage circuit. Did you complete the repair?	-	Go to Step 11	-
8	Check for a faulty connection at the ECM and HO2S electrical connectors. Repair as necessary. Was a repair necessary?	-	Go to Step 11	Go to Step 10
9	Replace the HO2S. Did you complete the replacement?	-	Go to Step 11	-
10	Replace the ECM. Did you complete the replacement?	-	Go to Step 11	-
11	Start the engine. Operate the vehicle within the conditions for setting the DTC as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 12	Go to Step 2
12	With a scan tool, observe the stored information. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Applicable DTC table	System OK

Diagnostic Trouble Code (DTC) P0038

HO2S Heater Control Circuit High Voltage Bank 1 Sensor 2

Circuit Description

The DTC P0038 monitors the HO2S heater circuit current. The heater is powered through the ignition switch and is grounded through the ECM heater control. The ECM commands the heater ON by grounding the heater control circuit. The HO2S sensor must be at operating temperature in order to accurately measure the oxygen content of the exhaust gas. The heater allows the HO2S to reach operating temperature quickly.

Conditions for Setting the DTC

Controler IC check the current and voltage of the output stage.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

Diagnostic Aids

An intermittent malfunction may be caused by a problem in the HO2S electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to "Intermittent".

If a DTC P0038 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set.

DTC P0038 - HO2S Heater Control Circuit High Voltage Sensor 2

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Measure the resistance of the heater element of the HO2S. Connect a DVM between terminal 2 and terminal 4, on the sensor side, of the HO2S connector. Is the HO2S heater resistance within the specified range?	4.5~5.7Ω	Go to Step 3	Go to Step 5
3	Turn OFF the ignition. Disconnect the HO2S and the ECM electrical connectors. Turn ON the ignition, leaving the engine OFF. Test the heater control circuit between the HO2S and the ECM for a short to voltage. Repair as necessary. Was a repair necessary?	-	Go to Step 7	Go to Step 4
4	Turn on the ignition, leaving the engine OFF. Using a scan tool, clear DTC. Operate the vehicle within the Freeze Frame conditions as specified. Does this DTC set?	-	Go to Step 6	Go to "Diagnostic Aids"
5	Replace the HO2S. Did you complete the replacement?	-	Go to Step 7	-
6	Replace the ECM. Did you complete the replacement?	-	Go to Step 7	-
7	Start the engine. Operate the vehicle within the conditions for setting the DTC as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 8	Go to Step 2
8	With a scan tool, observe the stored information. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Applicable DTC table	System OK

Diagnostic Trouble Code (DTC) P0106

Manifold Absolute Pressure (MAP) Sensor Performance

Circuit Description

The Engine Control Module (ECM) uses the Manifold Absolute Pressure (MAP) sensor to control the fuel delivery and the ignition timing. The MAP sensor measures the changes in the intake manifold pressure which results from engine load (intake manifold vacuum) and the rpm changes, and it converts these into voltage outputs. The ECM can detect if the MAP sensor is not responding to the Throttle Position (TP) changes by comparing the actual MAP change to a predicted MAP change based on the amount of TP change that occurs. If the ECM does not see the expected MAP change or more, DTC P0106 will set.

Conditions for Running the DTC

CASE 1

Engine speed is less than 25 rpm.
No MAP malfunction exist.

CASE 2

Engine is running for at least 2 seconds.
No MAP ETC malfunction exist.

Conditions for Setting the DTC

CASE 1

Manifold absolute pressure (MAP) is less than 400 hpa.

CASE 2

Difference between the MAP value measured from MAP sensor and the calculated MAP is greater than expected.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

Diagnostic Aids

With the ignition ON and the engine stopped, the manifold pressure is equal to atmospheric pressure and the signal voltage will be high. This information is used by the ECM as an indication of vehicle altitude. Comparison of this reading with a known good vehicle with the same sensor is a good way to check the accuracy of a suspect sensor.

The MAP sensor vacuum source should be thoroughly checked for restrictions at the intake manifold.

DTC P0106 - Manifold Absolute Pressure (MAP) Sensor Performance

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Install a scan tool to the Data Link Connector (DLC). Turn the ignition switch to ON, with the engine not running. Compare the Barometric Pressure (BARO) reading with a known good vehicle. Is the BARO reading similar?	-	Go to Step 3	Go to Step 8
3	Start the engine while watching the Manifold Absolute Pressure (MAP) sensor value. Does the MAP sensor value change while starting the engine?	-	Go to Step 4	Go to Step 5
4	With the engine still running, snap the throttle while watching the MAP sensor display on the scan tool. Does the MAP sensor value change rapidly with the throttle position changes?	-	Go to Step 9	Go to Step 6
5	Turn the ignition switch OFF. Remove the MAP sensor and install a vacuum pump to the MAP sensor. Turn the ignition switch ON, with the engine OFF. Apply 380 mm Hg (15 in Hg) to the MAP sensor. Does the MAP sensor value on the scan tool change?	-	Go to Step 7	Go to Step 8
6	Remove the MAP sensor from the manifold port. Inspect the port and MAP sensor for restrictions and repair as necessary. Is the repair complete?	-	Go to Step 9	Go to Step 8
7	Repair the restriction in the MAP sensor or vacuum port as necessary. Is the repair complete?	-	Go to Step 9	-
8	Replace the MAP sensor. Is the repair complete?	-	Go to Step 9	-
9	Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Start the engine and idle at normal operating temperature. Operate the vehicle within the Conditions for setting this DTC as specified in the supporting text. Does the scan tool indicate that this diagnostic has run and passed?	-	Go to Step 10	Go to Step 2
10	Check if any additional DTCs are set. Are any DTCs displayed that have not been diagnosed?	-	Go to Applicable DTC table	System OK

Diagnostic Trouble Code (DTC) P0107

Manifold Absolute Pressure(MAP) Sensor Circuit Low Voltage

Circuit Description

The engine control module (ECM) uses the Manifold Absolute Pressure (MAP) sensor to control the fuel delivery and the ignition timing. The MAP sensor measures the changes in the intake manifold pressure, which results from engine load (intake manifold vacuum) and the rpm changes; and converts these into voltage outputs. The ECM sends a 5 volt-reference voltage to the MAP sensor. As the manifold pressure changes, the output voltage of the MAP sensor also changes. By monitoring the MAP sensor output voltage, the ECM knows the manifold pressure. A low-pressure (low voltage) output voltage will be about 1.1 to 1.5 volts at idle, while higher pressure (high voltage) output voltage will be about 4.5 to 5.0V at wide open throttle (WOT). The MAP sensor is metric pressure, allowing the ECM to make adjustments for different altitudes.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

MAP sensor voltage is less than 0.156V for more than 1 second.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

Diagnostic Aids

With the ignition ON and the engine stopped, the manifold pressure is equal to atmosphere pressure and the signal voltage will be high.

The ECM as an indication of vehicle altitude uses this information. Comparison of this reading with a known good vehicle with the same sensor is a good way to check the accuracy of a suspect sensor. Readings should be the same ± 0.4volt.

If a DTC P0107 is intermittent, refer to "Manifold Absolute Pressure Check" in this section for further diagnosis.

If the connections are OK monitor the manifold absolute pressure (MAP) sensor signal voltage while moving related connectors and the wiring harness. If the failure is induced, the display on the scan tool will change. This may help to isolate the location of an intermittent malfunction.

DTC P0107 - Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Connect the scan tool to the data link connector (DLC). Turn the ignition switch to ON. Does the scan tool show the manifold absolute pressure (MAP) sensor voltage below the value specified?	4.1V	Go to Step 3	Go to Step 4
3	Disconnect the vacuum line from the MAP sensor. Apply 60 kPa (17.7 in Hg) of vacuum to the MAP sensor. Does the scan tool show the MAP sensor voltage within the value specified?	1.0-1.5V	Go to "Diagnostic Aids"	Go to Step 4
4	Turn the ignition switch to LOCK. Disconnect the MAP sensor connector. Turn the ignition switch to ON. Measure the voltage between the MAP sensor connector terminals 1 and 3. Does the voltage measure within the value specified?	4.5-5.5V	Go to Step 5	Go to Step 6
5	Connect a fused jumper between the MAP sensor connector terminals 2 and 3. Does the scan tool show the MAP sensor voltage above the value specified?	4.5V	Go to Step 13	Go to Step 11
6	Measure the voltage between the MAP sensor connector terminal 1 and ground. Does the voltage measure within the value specified?	4.5-5.5V	Go to Step 7	Go to Step 8
7	Turn the ignition switch to LOCK. Check for open wires between the MAP sensor connector terminal 1 and the ECM connector J2 terminal 5. Is the problem found?	-	Go to Step 8	Go to Step 9
8	Repair the wire or the connector terminal between the MAP sensor connector terminal 1 and ECM connector J2 terminal 5. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
9	Turn the ignition switch to LOCK. Check for an open or short to ground in the wire between the MAP sensor connector terminal 3 and the ECM connector J2 terminal 13. Is the problem found ?	-	Go to Step 10	Go to Step 11
10	Repair the wire or the connector terminal as needed. Clear any DTCs from the ECM. Perform the diagnostic system check. Is the repair complete?	-	System OK	-
11	Check for an open or short to ground in the wire between the MAP sensor connector terminal 2 and the ECM connector J2 terminal 19. Is the problem found ?	-	Go to Step 12	Go to Step 14
12	Repair the wire or the connector terminal between MAP sensor connector terminal 2 and the ECM connector J2 terminal 19. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
13	Replace the MAP sensor. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
14	Turn the ignition switch to LOCK. Replace the ECM. Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-

Diagnostic Trouble Code (DTC) P0108

Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Circuit Description

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

MAP sensor voltage is greater than 4.961 V.

Action Taken When the DTC Sets

The Malfunction Indicator Lamp (MIL) will be illuminated after 3 valid driving cycles.
The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
A history DTC is stored.

Conditions for Clearing the MIL/DTC

The MIL will turn off after three or four consecutive driving cycles in which the diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Disconnecting the ECM battery feed for 10 seconds.

Diagnostic Aids

With the ignition ON and the engine stopped, the manifold pressure is equal to atmosphere pressure and the signal voltage will be high.

If a DTC P0108 is intermittent, refer to "Manifold Absolute Pressure Check" in this section for further diagnosis.

If the connections are OK monitor the manifold absolute pressure(MAP) sensor signal voltage while moving related connectors and the wiring harness. If the failure is induced, the display on the scan tool will change. This may help to isolate the location of an intermittent malfunction.

DTC P0108 - Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

Step	Action	Value(s)	Yes	No
1	Perform the Diagnostic System Check. Is the system check complete?	-	Go to Step 2	Go to "Diagnostic System Check"
2	Check for a crack, vacuum leak, or blockage in the vacuum line of the MAP sensor. Is the problem found?	-	Go to Step 3	Go to Step 4
3	Repair or replace the vacuum line in the MAP sensor. Perform a road test. Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
4	Install the scan tool to the Data Link Connector (DLC). Turn the ignition switch to ON. Does the scan tool show the MAP sensor voltage below the specified value?	4.1V	Go to Step 5	Go to Step 6
5	Disconnect the vacuum line from the MAP sensor. Apply 60kPa (17.7 inHg) of vacuum to the MAP sensor. Does the scan tool show the MAP sensor voltage between the specified value?	1.1~1.5V	Go to "Diagnostic Aids"	Go to Step 6
6	Turn the ignition switch to LOCK. Disconnect the MAP sensor connector. Turn the ignition switch to ON. Measure the voltage between the MAP sensor connector terminal 1 and 3. Is the voltage between the specified value?	4.5~5.5V	Go to Step 7	Go to Step 8
7	Connect a fused jumper between the MAP sensor connector terminal 2 and 3. Does the scan tool show the MAP sensor voltage above the specified value?	4.5V	Go to Step 15	Go to Step 13
8	Measure the voltage between the MAP sensor connector terminal 3 and the ground. Is the voltage between the specified value?	4.5~5.5V	Go to Step 9	Go to Step 11
9	Check for a short in the wire between the MAP sensor connector terminal 1 and the ECM connector J2 terminal 5. Is the problem found?	-	Go to Step 10	Go to Step 11
10	Repair the wire or the connector terminal between the MAP sensor connector terminal 1 and the ECM connector J2 terminal 5. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
11	Check for a short in the wire between the MAP sensor connector terminal 3 and the ECM connector J2 terminal 13. Is the problem found?	-	Go to Step 12	Go to Step 13
12	Repair the wire or the connector terminal between the MAP sensor connector terminal 3 and the ECM connector J2 terminal 13. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
13	Check for a short in the wire between the MAP sensor connector terminal 2 and the ECM connector J2 terminal 19. Is the problem found?	-	Go to Step 14	Go to Step 16
14	Repair the wire or the connector terminal between the MAP sensor connector terminal 2 and the ECM connector J2 terminal 19. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
15	Replace the MAP sensor. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-
16	Turn the ignition switch to LOCK. Replace the ECM. Perform the Diagnostic System Check. Is the repair complete?	-	System OK	-