Service Information

Cruze

DTC P0131-P0134

Diagnostic Instructions

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

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC P0131 00: HO2S Circuit Low Voltage Sensor 1

DTC P0132 00: HO2S Circuit High Voltage Sensor 1

DTC P0133 00: HO2S Slow Response Sensor 1

DTC P0134 00: HO2S Circuit Insufficient Activity Sensor 1

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Heater Voltage Supply	P0031 00, P0130 00	P0135 00	-	-
Heater Low Control	P0031 00	P0031 00, P0135 00	P0032 00	-
Signal Circuit	P0131 00	P0134 00	P0132 00	P0133 00, P0134 00
Ignition Voltage	Opens Fuse	P0134 00	-	-

Circuit/System Description

Heated Oxygen Sensors 1 or 2 are used for fuel control and post catalyst monitoring. Each heated oxygen sensor compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The heated oxygen sensors must reach operating temperature to provide an accurate voltage signal. Heating elements inside the heated oxygen sensor minimise the time required for the sensors to reach operating temperature. The engine control module (ECM) supplies the heated oxygen sensor with a reference, or bias, voltage of about 450 mV. When the engine is first started, the ECM operates in open loop, ignoring the heated oxygen sensor voltage signal. Once the heated oxygen sensor reaches operating temperature and closed loop is achieved, the heated oxygen sensor generates a voltage within a range of 0-1000 mV that fluctuates above and below bias voltage. High heated oxygen sensor voltage indicates a rich exhaust stream. Low heated oxygen sensor voltage indicates a lean exhaust stream.

Conditions for Running the DTC

•

DTCs P0031 00, P0032 00, P0037 00, P0038 00, P0106 00, P0107 00, P0108 00, P0112 00, P0113 00, P0117 00, P0118 00, P0122 00, P0123 00, P0135 00, P0141 00, P0171 00, P0172 00, P0261 00, P0262 00, P0264 00, P0265 00, P0267 00, P0268 00, P0260 00, P0271 00, P0300 00, P0335 00, P0336 00, P0351 00, P0352 00, P0401 00, P0402 00, P0404 00, P0405 00, P0406 00, P0458 00, P0459 00, P0502 00,P0506 00, P0507 00, P0562 00, P0563 00, or P2110 00 are not set.

•	The engine has been operating for greater than 60 s.

•	The calculated airflow into the engine is greater than 9 g/s.

•	The engine coolant temperature is greater than 60°C (140°F).

•	The ignition voltage is between 11-18 V

•	The fuel system is in closed loop.

•	The vehicle is not decelerating.

•	The DTCs run continuously when the above conditions are met for 3 s.

Conditions for Setting the DTC

P0131 00

•	The ECM detects that the HO2S 1 voltage parameter is less than 50 mV.

•	DTC P0131 00 sets within 20 s when the above condition is met.

P0132 00

•	The ECM detects that the heated oxygen sensors 1 parameter is more than 950 mV.

•	DTC P0132 00 sets within 5.5 s when the above condition is met.

P0133 00

•	The ECM detects that the heated oxygen sensors 1 rich to lean or lean to rich average response time is more than 0.1 s.

•	DTC P0133 00 sets within 2.5 s when the above condition is met.

P0134 00

•	The ECM detects that the activity of the heated oxygen sensors 1 is less than a calibrated value.

•	DTC P0134 00 sets within 20 s after the above condition is met.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

•	Heated Oxygen Sensor Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Clear the DTCs with a scan tool.
Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.

Circuit/System Testing

Note: You must perform the circuit/system verification before proceeding with circuit/system testing.

Ignition OFF, disconnect the harness connector at the B52A Heated Oxygen Sensor 1. Allow sufficient time for the K20 Engine Control Module to completely power down.
Ignition OFF, test for less than 5 Ω between the B52A Heated Oxygen Sensor 1 harness connector low reference circuit terminal 2 and ground.

⇒	If greater than 5 Ω, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

Ignition ON, verify the appropriate scan tool HO2S Sensor 1 parameter is approximately 450 mV.

⇒	If more than the specified value, test the B52A Heated Oxygen Sensor 1 high signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.

⇒	If less than the specified value, test the B52A Heated Oxygen Sensor 1 high signal circuit for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.

Ignition ON, install a 3 A fused jumper wire at the B52A Heated Oxygen Sensor 1 high signal circuit terminal 1. Toggle the other end of the jumper wire between the B52A Heated Oxygen Sensor 1 low signal circuit terminal 3 and battery voltage. Verify the appropriate scan tool HO2S Sensor 1 parameter toggles between 0 mV and approximately 5000 mV.

⇒	If the appropriate scan tool HO2S Sensor 1 parameter does not toggle correctly, test the B52A Heated Oxygen Sensor 1 high signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

If all circuits test normal, replace the B52A Heated Oxygen Sensor 1.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Heated Oxygen Sensor Replacement - Sensor 1

•	Control Module References for ECM replacement, setup, and programming