Service Manual2007 Captiva Diagnostic Trouble Code (DTC) P0133 or P0153

Captiva

Diagnostic Trouble Code (DTC) P0133 or P0153

DTC Descriptor

DTC P0133 :HO2S Slow Response Bank 1 Sensor 1

DTC P0153 : HO2S Slow Response Bank 2 Sensor 1

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
HO2S Bank 1 Sensor 1 Signal	P0131	P0130, P0134	P0132	P0130, P0133
HO2S Bank 1 Sensor 2 Signal	P0137	P0136, P0140	P0138	P0136, P0139
HO2S Bank 2 Sensor 1 Signal	P0151	P0150, P0154	P0152	P0150, P0153
HO2S Bank 2 Sensor 2 Signal	P0157	P0156, P0160	P0158	P0156, P0159
Low Reference	-	P0130, P0136, P0150, P0156	P0134, P0140, P0154, P0160	-

Circuit Description

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0–1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

Conditions for Running the DTC

P0133 or P0153

The ignition voltage is between 10–16 volts.
The engine is operating.

Conditions for Setting the DTC

P0133 or P0153

The ECM detects that the H02S voltage is high.

Action Taken When the DTC Sets

DTCs P0133 and P0153 are Type E DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0133 and P0153 are Type E DTCs.

Circuit/System Verification

Verify that other DTCs are not set.

If any other DTCs are set, refer to the appropriate DTC information.

Engine idling, observe the HO2S voltage parameter. The voltage should fluctuate above and below the range of 350–550 mV.
Operate the vehicle within the conditions for running the DTC. DTCs P0133 and P0153 should not set.
If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

Circuit/System Testing

Verify that none of the following conditions exist :

Lean fuel injectors
Water intrusion in the HO2S harness connector
HO2S wiring harness damage
Incorrect RTV sealant
Low or high fuel system pressure
Fuel that is contaminated
Fuel saturation of the evaporative emission (EVAP) canister
Exhaust leaks near the HO2S
Engine vacuum leaks
Engine oil consumption
Engine coolant consumption

If you find any of the above conditions, repair as necessary.

If all conditions test normal, replace the appropriate HO2S.

Diagnostic Trouble Code (DTC) P0135, P0141, P0155, or P0161

DTC Descriptor

DTC P0135 : HO2S Heater Performance Bank 1 Sensor 1

DTC P0141 : HO2S Heater Performance Bank 1 Sensor 2

DTC P0155 : HO2S Heater Performance Bank 2 Sensor 1

DTC P0161 : HO2S Heater Performance Bank 2 Sensor 2

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition 1 Voltage	P0135, P0141	P0135, P0141	-	-
HO2S 1 Heater Control	P0135	P0135	P0135	-
HO2S 2 Heater Control	P0141	P0141	P0141	-

Circuit Description

The heated oxygen sensor (HO2S) heater reduces the time required for the oxygen sensor to reach operating temperature and maintains the operating temperature during extended idle periods. When the ignition is turned to the ON position, ignition voltage is supplied directly to the sensor heater. The engine control module (ECM) controls the heater operation by first modulating the control circuit to ground when the sensors are cold. This prevents the possibility of thermal shock to the sensor, from condensation build-up on the sensor, by controlling the sensor’s rate of heating. After a predetermined amount of time, the ECM commands the heaters ON continuously. Once the sensor reaches operating temperature, the ECM may modulate the heater control circuit to ground to maintain a desired temperature.

Conditions for Running the DTC

P0133 or P0153

The ignition voltage is between 10–16 volts.
The engine is operating.

Conditions for Setting the DTC

P0133 or P0153

The ECM detects that the H02S voltage is high.

Action Taken When the DTC Sets

DTCs P0135, P0141, P0155, and P0161 are Type E DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0135, P0141, P0155, and P0161 are Type E DTCs.

Circuit/System Verification

Important : It may take up to 8 minutes for the DTC to set.

With the engine at normal operating temperature, operate the engine above 1,200 RPM for 30 seconds and then allow the engine to idle. DTCs P0135, P0141, P0155, or P0161 should not set.
If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

Circuit/System Testing

Ignition OFF, disconnect the harness connector of the appropriate HO2S.
Ignition ON, load test for battery voltage on the ignition voltage circuit of the HO2S heater.

If less than B+, repair the ignition voltage circuit of the HO2S heater for a short to ground or an open/high resistance.

Ignition OFF, connect a test lamp between the control circuit of the HO2S heater and B+.

If test lamp illuminates, test the control circuit of the HO2S heater for a short to ground. If the circuit/connections test normal, replace the ECM.

Ignition ON, test for less than 0.3 volt between the control circuit of the HO2S heater at the test lamp probe and ground.

If greater than 0.3 volt, test the control circuit of the HO2S heater for a short to voltage or an open/high resistance. If the circuit/connections test normal, replace the ECM.

If all circuits/connections test normal, test or replace the HO2S.

Component Testing

Ignition OFF, disconnect the harness connector of the appropriate HO2S.
Test the HO2S heater resistance for 3-35 ohms.

If the resistance is out of the specified range, replace the HO2S.

Diagnostic Trouble Code (DTC) P0137, P0138, P0140, P0157, P0158, or P0160

DTC Descriptor

DTC P0137 : HO2S Circuit Low Voltage Bank 1 Sensor 2

DTC P0138 : HO2S Circuit High Voltage Bank 1 Sensor 2

DTC P0140 : HO2S Circuit Insufficient Activity Bank 1 Sensor 2

DTC P0157 : HO2S Circuit Low Voltage Bank 2 Sensor 2

DTC P0158 : HO2S Circuit High Voltage Bank 2 Sensor 2

DTC P0160 : HO2S Circuit Insufficient Activity Bank 2 Sensor 2

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
HO2S Bank 1 Sensor 1 Signal	P0131	P0130	P0132	P0130, P0133, P0134
HO2S Bank 1 Sensor 2 Signal	P0137	P0136	P0138	P0136, P0139, P0140
HO2S Bank 2 Sensor 1 Signal	P0151	P0150	P0152	P0150, P0153, P0154
HO2S Bank 2 Sensor 2 Signal	P0157	P0156	P0158	P0156, P0159, P0160
Low Reference	-	P0130, P0136, P0150, P0156	P0132, P0138, P0152, P0158	-

Circuit Description

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

Conditions for Running the DTC

P0137, P0138, P0140, P0157, P0158 or P0160

The ignition voltage is between 10–16 volts.
The engine is operating.

Conditions for Setting the DTC

P0137, P0138, P0140, P0157, P0158 or P0160

The ECM detects that the H02S voltage is high.

Action Taken When the DTC Sets

DTCs P0137, P0138, P0140, P0157, P0158, and P0160 are Type E DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0137, P0138, P0140, P0157, P0158, and P0160 are Type E DTCs.

Circuit/System Verification

With the engine running, observe the heated oxygen sensor (HO2S) voltage parameter. The reading should fluctuate above and below the range of 350-550 mV.
If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

Circuit/System Testing

Ignition OFF, disconnect the harness connector of the appropriate HO2S sensor.
Ignition ON, verify that the HO2S parameter is between 350-500 mV.

If less than 350 mV, test the signal circuit of the HO2S sensor for a short to ground. If the circuit/connections test normal, replace the ECM.
If greater than 500 mV, test the signal circuit of the HO2S sensor for a short to voltage. If the circuit/connections test normal, replace the ECM.

Ignition OFF, test for less than 5 ohms of resistance between the low reference circuit of the HO2S sensor and ground.

If greater than 5 ohms, test the low reference circuit of the HO2S sensor for an open/high resistance. If the circuit/connections test normal, replace the ECM.

Install a 3-amp fused jumper wire between the signal circuit and the low reference circuit of the HO2S sensor and verify the HO2S sensor parameter is less than 60 mV.

If greater than 60 mV, test the signal circuit of the HO2S sensor for an open/high resistance. If the circuit/connections test normal, replace the ECM.

Verify that the following conditions do not exist :

Lean fuel injectors
Low fuel system pressure
Fuel that is contaminated
Exhaust leaks near the HO2S
Engine vacuum leaks

If you find any of the above conditions, repair as necessary.

If all circuits/connections test normal, replace the HO2S sensor.

Diagnostic Trouble Code (DTC) P0196, P0197, or P0198

DTC Descriptor

DTC P0196 : Engine Oil Temperature Sensor (EOT) Sensor Performance

DTC P0197 : Engine Oil Temperature Sensor (EOT) Circuit Low Voltage

DTC P0198 : Engine Oil Temperature Sensor (EOT) Circuit High Voltage

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit/System Description

The Engine Oil Temperature (EOT) Sensor is a variable resistor that measures the temperature of the engine oil. The engine control module (ECM) supplies a 5 voltage to the EOT signal circuit and supplies a ground for the reference circuit.

Conditions for Running the DTC

P0196, P0197 or P0198

The engine has been running for more than 10 seconds.
This DTC runs continuously within the enabling conditions.

Conditions for Setting the DTC

P0196

The ECM detects that the engine EOT sensor is not within 100°C of predetermined values.

P0197

The ECM detects that the EOT sensor is less than -35°C of longer than 3 seconds.

P0198

The ECM detects that the EOT sensor is greater than 170°C for longer than 3 seconds.

Action Taken When the DTC Sets

DTCs P0196, P0197 and P0198 are Type E DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0196, P0197 and P0198 are Type E DTCs.

Circuit/System Testing

P0196, P0197 or P0198

Ignition ON, engine OFF.
Disconnect the EOT sensor harness connector.
Measure for correct voltage range of 4.9–5.2 Volts at the harness connection of the EOT.

If the voltage is less than 4.9 volts, test the EOT sensor circuit for a short to ground or an open/high resistance.
If the voltage is greater than 5.2 volts, test the EOT circuit for a short to voltage.
If the EOT circuit tests normal and the voltage is not within the correct range then replace the ECM.

Connect a 3A fusible link wire between the signal circuit of the EOT and the low reference circuit.

Observe the sensor parameters while connecting and disconnecting the link between the EOT sensor signal and the low reference circuit.
The EOT should switch between the upper and lower limits.
If the EOT signal does not switch between the upper and lower limits then replace the ECM.
If the EOT signal does switch between the upper and lower limits then replace the EOT.

Diagnostic Trouble Code (DTC) P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277

DTC Descriptor

DTC P0201 : Injector 1 Control Circuit

DTC P0202 : Injector 2 Control Circuit

DTC P0203 : Injector 3 Control Circuit

DTC P0204 : Injector 4 Control Circuit

DTC P0205 : Injector 5 Control Circuit

DTC P0206 : Injector 6 Control Circuit

DTC P0261 : Injector 1 Control Circuit Low Voltage

DTC P0262 : Injector 1 Control Circuit High Voltage

DTC P0264 : Injector 2 Control Circuit Low Voltage

DTC P0265 : Injector 2 Control Circuit High Voltage

DTC P0267 : Injector 3 Control Circuit Low Voltage

DTC P0268 : Injector 3 Control Circuit High Voltage

DTC P0270 : Injector 4 Control Circuit Low Voltage

DTC P0271 : Injector 4 Control Circuit High Voltage

DTC P0273 : Injector 5 Control Circuit Low Voltage

DTC P0274 : Injector 5 Control Circuit High Voltage

DTC P0276 : Injector 6 Control Circuit Low Voltage

DTC P0277 : Injector 6 Control Circuit High Voltage

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Ignition 1 Voltage	P0201, P0202, P0203, P0204, P0205, P0206	P0201, P0202, P0203, P0204, P0205, P0206	-	-
Injector 1 Control Circuit	P0261	P0201	P0262	-
Injector 2 Control Circuit	P0264	P0204	P0265	-
Injector 3 Control Circuit	P0267	P0203	P0268	-
Injector 4 Control Circuit	P0270	P0204	P0271	-
Injector 5 Control Circuit	P0273	P0205	P0274	-
Injector 6 Control Circuit	P0276	P0206	P0277	-

Circuit/System Description

The control module enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied directly to the fuel injectors. The control module controls each fuel injector by grounding the control circuit with a solid state device called a driver. The control module monitors the status of each driver. Each driver has a feedback voltage circuit which the engine control module (ECM) monitors. The injector control circuits are pulled-up to voltage within the ECM. The ECM can determine if a control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

Conditions for Running the DTC

The engine speed is more than 80 RPM.
The ignition 1 voltage is between 10-18 volts.
The DTCs run continuously once the above conditions are met.

Conditions for Setting the DTC

DTC P0201, P0202, P0203, P0204, P0205, or P0206The ECM detects the injector control circuit is open.

DTC P0261, P0264, P0267, P0270, P0273, or P0276The ECM detects the injector control circuit is shorted to ground.

DTC P0262, P0265, P0268, P0271, P0274, or P0277The ECM detects the injector control circuit is shorted to voltage.

Action Taken When the DTC Sets

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 are Type E DTCs.

Conditions for Clearing the DTC

DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 are Type E DTCs.

Diagnostic Aids

Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Coil Test.

If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the circuit status for the component with a scan tool. The circuit status parameter changes from OK or Indeterminate to Fault if there is a condition with the circuit or a connection. The ODM information is in the output driver module (ODM) data list.

Circuit/System Verification

Observe the Misfire Current Counters with a scan tool. The Misfire Current Counters should not be incrementing
Engine operating, observe the DTC information with a scan tool. DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 should not set.

Circuit/System Testing

Important : Disconnecting the multi-way harness connector causes P0201-P0206 fuel injector circuit open DTCs to set.

Ignition OFF, disconnect the fuel injector multi-way harness connector.
Ignition ON, test for less than 0.1 volts between the ignition 1 voltage circuit and the positive terminal of the battery.

Important : The ignition circuit supplies voltage to other components. Make sure you test all circuits for a short to ground or test all components for being shorted that share the ignition circuit.

If greater than 0.1 volts, repair the ignition 1 voltage circuit of the fuel injector for a short to ground between the fuel injector and the fuse. Or, for an open/high resistance between the multi-way connector and B+. Replace the fuse if necessary.

Connect a test lamp between the appropriate injector control circuit, ECM side of the multi-way harness connector, and B+.
Crank the engine, the test lamp should flash.

If the test lamp remains ON all the time, test for a short to ground on the control circuit. If circuit/connections test normal, replace the ECM.
If the test lamp remains OFF all the time, test for a short to voltage or an open/high resistance on the control circuit. If circuit/connections test normal, replace the ECM.

Ignition ON, measure for 2.6-4.6 volts between the control circuit of the fuel injector, ECM side of the multi-way connector, andground.

If the voltage is not specified range and the circuit/connections test normal, replace the ECM.

Remove the upper intake manifold.
Disconnect the fuel injector connectors.
Test for continuity between the ignition 1 voltage circuit(s) and the appropriate fuel injector control circuit, at the fuel injector side of the multi-way harness connector, the DMM should display OL.

If less than OL repair the short between the ignition 1 voltage circuit and the control circuit of the appropriate fuel injector.

Measure for less than 1 ohm of resistance in the appropriate ignition 1 voltage circuit, between the injector connector(s) and the multi-way connector, with a DMM.

If more than 1 ohm repair the open/high resistance in the ignition 1 voltage circuit.

Measure for less than 1 ohm of resistance in the suspected control circuit, between the injector connector and the multi-way connector.

If more than 1 ohm repair the open/high resistance in the fuel injector control circuit.

Test for continuity between appropriate fuel injector control circuit and ground. The DMM should display OL.

If less than OL repair the short to ground in the fuel injector control circuit.

Test for continuity between the suspected fuel injector control circuit and all the other control circuits of the fuel injectors. The DMM should display OL.

If less than OL is measured between any of the control circuits, repair the wire to wire short between those circuits.

If all circuits/connections test normal, test or replace the fuel injector(s).

Component Testing

Measure for 12-16 ohms of resistance between the terminals of the fuel injector.

If the resistance is not within the specified range, replace the fuel injector.

Diagnostic Trouble Code (DTC) P0219

DTC Descriptor

DTC P0219 : Engine Overspeed

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit/System Description

THe ECM continually monitors the engines operating environment. An engine over-speed condition set if the ECM detects an engine speed that is in excess of 7200 RPM.

Conditions for Running the DTC

The vehicle is fitted with a manual transmission.
The engine is running.
Ignition voltage is between 10-16 volts

Conditions for Setting the DTC

The ECM detects an engine speed that is in excess of 7200 RPM for one second our longer.

Action Taken When the DTC Sets

DTC P0219 is a type A DTC.

Conditions for Clearing the DTC

DTC P0219 is a type A DTC.

Diagnostic Aids

An over speed condition can only exist when a low gear on a manual transmission is selected whilst the vehicle is travelling at high road speed. This DTC can not be set by free revving the engine.

Circuit/System Verification

Start the engine, operate the vehicle within the conditions for running, DTC P0219 should not set.

Circuit/System Testing

If no other DTCs are set. Using the a scan tool clear this DTC. Operate the vehicle to the conditions for setting the DTC.

If the DTC resets, replace the ECM.

Diagnostic Trouble Code (DTC) P0300, P0301, P0302, P0303, P0304, P0305, or P0306

DTC Descriptor

DTC P0300 : Engine Misfire Detected

DTC P0301 : Cylinder 1 Misfire Detected

DTC P0302 : Cylinder 2 Misfire Detected

DTC P0303 : Cylinder 3 Misfire Detected

DTC P0304 : Cylinder 4 Misfire Detected

DTC P0305 : Cylinder 5 Misfire Detected

DTC P0306 : Cylinder 6 Misfire Detected

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit/System Description

The engine control module (ECM) uses information from the crankshaft position (CKP) sensor and the camshaft position (CMP) sensors in order to determine when an engine misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM is able to detect individual misfire events. A misfire rate that is high enough can cause 3-way catalytic converter damage. The malfunction indicator lamp (MIL) will flash ON and OFF when the conditions for catalytic converter damage are present. DTCs P0301 through P0306 correspond to cylinders 1 through 6. If the ECM is able to determine that a specific cylinder is misfiring, the DTC for that cylinder will set.

Conditions for Running the DTC

DTCs P0121, P0122, P0123, P0221, P0222, P0223, P0335, P0336, or P0338 are not set.
The engine speed is between 400-7,000 RPM and steady.
The engine run time is more than 45 seconds.
The delivered torque signal is more than 10 percent at idle.
The delivered torque signal is between 9-30 percent with the transmission in drive.
The intake air temperature (IAT) is more than -30°C (-22°F).
The A/C compressor clutch is not changing states.
The torque management is not active.
The antilock brake system/traction control system ABS/TCS) is not active.
The ECM is not receiving a rough road signal.
The fuel level is more than 12 percent.
The ECM is not in fuel cut-off or decel fuel cut-off mode.
The throttle angle is steady.
DTC P0300 runs continuously when the above conditions exist for at least 1000 engine revolutions.

Conditions for Setting the DTC

DTC P0300The ECM detects a crankshaft rotation speed variation indicating a misfire rate sufficient to cause emissions levels to exceed a predetermined value for more than 4 seconds.

DTC P0301, P0302, P0303, P0304, P0305, P0306The ECM detects a crankshaft rotation speed variation indicating a single cylinder misfire rate sufficient to cause emissions levels to exceed mandated standards.

Action Taken When the DTC Sets

DTC P0300 is a Type E DTC.

Conditions for Clearing the DTC

DTC P0300 is a Type E DTC.

Diagnostic Aids

A misfire DTC could be caused by an excessive vibration from sources other than the engine. Inspect for the following possible sources :

A tire or wheel that is out of round or out of balance
Variable thickness brake rotors
An unbalanced drive shaft
Certain rough road conditions
A damaged accessory drive component or belt

Circuit/System Verification

Engine idling at the normal operating temperature.

If there is an abnormal engine noise, refer to Section 1C2, DOHC Engine Mechanical - HFV6 3.2L.

Verify that DTCs: DTC P0011, P0014, P0021, P0024, P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P0335, P0336, P0338, P0351-P0356, P2088, P2090, P2092, P2094, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 are not set.

If a DTC is set, refer to the appropriate DTC information.

Observe the Misfire Current Cyl. 1-6 parameters with a scan tool. The Misfire Current Counters should not be incrementing
Engine idling, perform the cylinder power balance test with a scan tool to isolate the misfiring cylinder. The engine speed should change when each injector is disabled.

Circuit/System Testing

Verify that the following conditions do not exist :

Vacuum hose splits, kinks, and incorrect connections
Engine vacuum leaks
Crankcase ventilation system for vacuum leaks
Fuel pressure that is too low or too high
Contaminated Fuel
Exhaust system restrictions

If you find any of the above conditions, repair as necessary.

Ignition OFF, remove the ignition coil of the misfiring cylinder, but leave the electrical connector connected.
Inspect the ignition coil boot for the following conditions :

Holes
Tears
Carbon tracking
Oil contamination
water intrusionir as necessary.

If you find any of the above conditions, repair as necessary.

Remove the fuel pump fuse from the fuse block.
Install the a spark tester to the spark plug.

Important : An erratic or weak spark is considered a no spark condition.

Attempt to start the engine and observe the tester. The spark tester should spark.

If there is no spark, test the spark plug wire for less than 1,000 ohms per 31 cm (per foot). Replace the spark plug wire if more than the specified value.

Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the following conditions do not exist with the spark plug :

Gas, coolant, or oil fouled
Cracked, worn, incorrectly gapped

If there is a condition with the spark plug, replace the spark plug.

Exchange the suspected spark plug with another cylinder that is operating correctly.
Engine idling, observe the Misfire Current Counters with a scan tool. The misfire should not follow the spark plug exchange.

If the misfire follows the spark plug, replace the spark plug.

If all conditions test normal, test or inspect for the following :

A lean or rich fuel injector
An engine mechanical condition

Repair Verification

If the customer concern was a flashing malfunction indicator lamp (MIL), refer to Diagnostic Trouble Codes.
Clear the DTCs with a scan tool.
Turn OFF the ignition for 30 seconds.
Start the engine.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

If the DTC fails this ignition, a misfire still exists.

Diagnostic Trouble Code (DTC) P0324, P0327, P0328, P0332, or P0333

DTC Descriptor

DTC P0324 :Knock Sensor (KS) Module Performance

DTC P0327 : Knock Sensor (KS) Circuit Low Voltage Bank 1

DTC P0328 : Knock Sensor (KS) Circuit High Voltage Bank 1

DTC P0332 : Knock Sensor (KS) Circuit Low Voltage Bank 2

DTC P0333 : Knock Sensor (KS) Circuit High Voltage Bank 2

Diagnostic Fault Information

Perform the Diagnostic System Check prior to using this diagnostic procedure.

Circuit/System Description

The knock sensor (KS) is a piezoelectric device that produces an AC voltage of different amplitude and frequency depending on the level of engine mechanical vibration. The KS system monitors the knock sensor in order to determine if detonation or spark knock is present. If the KS system determines that excessive knock is present, the engine control module (ECM) retards the spark timing based on the signal from the KS system. The KS produces an AC signal when specific frequencies are detected. The ECM then retards the timing until knock is controlled.

In order to differentiate between normal engine noise and spark knock, the ECM samples the KS signal. The ECM samples the KS signal for a certain length of time under different engine speeds and loads during non-cylinder knock events. This sampling is used to determine a range of acceptable normal engine noise.

Conditions for Running the DTC

Before the ECM can report DTC P0327, P0328, P0332 or P0333 failed, DTCs P0324, P0335, P0336, and P0338 must run and pass.
DTCs P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, and P0393 are not set.
The ECM is controlling spark.
The engine coolant temperature (ECT) sensor is more than 60°C (140°F).
The engine speed is more than 2,000 RPM and steady.
The volumetric efficiency is steady.
DTCs P0327, P0328 P0332 and P0333 run continuously once the above conditions are met for approximately 20 seconds.

Conditions for Setting the DTC

DTCs P0324The ECM detects an incorrect response to an internal ECM KC circuitry test.

DTCs P0327 or P0332The ECM detects a KS signal voltage that is less than the typical engine noise level for at least 4 seconds.

DTCs P0328 or P0333The ECM detects the KS signal voltage is more than the maximum normal engine noise level for more than 4 seconds.

Action Taken When the DTC Sets

DTCs P0324, P0327, P0328, P0332, and P0333 are Type C DTCs.

Conditions for Clearing the DTC

DTCs P0324, P0327, P0328, P0332, and P0333 are Type C DTCs.

Diagnostic Aids

Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
The KS must be clear of hoses, brackets, and engine electrical wiring.
The normal KS signal voltage is 0.25 volts when the KS is disconnected.

Circuit/System Verification

Start the engine. Observe the DTC information with a scan tool. DTCs P0324, P0327, P0328, P0332 or P0333 should not set.
If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

Circuit/System Testing

Ignition OFF, disconnect the harness connector of the appropriate KS.
Ignition ON, connect a test lamp between the signal circuit of the KS and the negative battery terminal.

If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the ECM.

Ignition ON, connect a test lamp between the signal circuit of the KS and the positive battery terminal.

If the test lamp illuminates, test the signal circuit for a short to ground. If the circuits/connections test normal, replace the ECM.

Ignition OFF, measure for less than 5 ohms of resistance between the low reference of the KS circuit and ground.

If the resistance is above the specified value, test the low reference circuit for an open/high resistance. If the circuits/connections test normal, replace the ECM.

If all circuits/connections test normal, replace the KS sensor.