Cruze

DTC P0544 or P2031

The exhaust gas temperature sensors are variable resistors that measure the temperature of the exhaust gas. The exhaust gas temperature sensor 1 is located in the exhaust pipe after the catalytic converter. The exhaust gas temperature sensor 2 sensor is located in the exhaust gas particulate filter. The engine control module (ECM) supplies 5 V to the exhaust gas temperature sensors signal circuit and supplies a ground to the low reference circuit. The exhaust gas temperature sensors temperature information is used by the ECM during the exhaust gas particulate filter cleaning process.

The following table illustrates the difference between temperature, resistance, and voltage:

P0544 03 and P2031 03

The ECM detects that the exhaust gas temperature sensor is less than 0.1 V for greater than 0.5 s.

P0544 07 and P2033 03

The ECM detects that the exhaust gas temperature sensor is greater than 4.9 V for greater than 0.5 s.

DTCs P0544 and P2031 are Type A DTCs.

DTCs P0544 and P2031 are Type A DTCs.

Schematic Reference

Engine Controls Schematics : LLW

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Engine running, observe the DTC information with a scan tool. DTCs P0544 03, P0544 07, P2031 03, or P2031 07 should not set.
2. 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.

1. Ignition OFF, disconnect the harness connector at the appropriate B131 Exhaust Temperature Sensor.
2. Test for less than 5 Ω between the low reference circuit terminal 2 and ground.

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

3. Ignition ON, verify the scan tool exhaust gas temperature sensor parameter is at 5 V.

⇒	If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.

Note: If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage and the sensor may be damaged.

4. Install a 1 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool exhaust gas temperature sensor parameter is at 0 V.

⇒	If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

5. If all circuits test normal, test or replace the B131 Exhaust Temperature Sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.