Cruze

DTC P02E0-P02E3, P02E8, P02E9, P02EB, or P122B

A throttle plate actuator is used to achieve high exhaust gas recirculation rates. It increases the pressure difference between exhaust and inlet so that the appropriate exhaust quantity can be mixed with the inlet air. The ECM transmits the desired angle as a PWM signal to the throttle plate actuator. The throttle plate actuator operates the DC motor to control the throttle plate based on the PWM signal from the ECM. The throttle plate position is monitored by an internal position sensor.

The ECM detects an open, short to ground, or a short to voltage on the throttle actuator control circuit for greater than 1 s.

DTC P02E0 00, P02E1 00, P02E2 00, P02E3 00, P02E8 00, P02E9 00, P02EB 00, P122B 00 are a Type B DTC.

DTC P02E0 00, P02E1 00, P02E2 00, P02E3 00, P02E8 00, P02E9 00, P02EB 00, P122B 00 are a Type B DTC.

Schematic Reference

Engine Controls Schematics

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. Ignition ON, command the throttle position from 0-95% with a scan tool. The throttle blade should respond to the scan tool commands.
2. Observe the scan tool DTC information parameter. DTC P02E0 00, P02E1 00, P02E2 00, P02E3 00, P02E8 00, P02E9 00, P02EB 00, or P122B 00 should not set.
3. 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.

Inlet Air Flow Valve Control

1. Ignition OFF, disconnect the harness connector at the Q38 Throttle Body.
2. Disconnect the harness connector X1 from the K20 Engine Control Module.
3. Test for less than 5 Ω between the Q38 Throttle Body control circuit terminal 1 and K20 Engine Control Module terminal 83.

⇒	If greater than the specified range, repair the control circuit for an open/high resistance.

4. Test for less than 5 Ω between the control circuit terminal 1 and ground.

⇒	If greater than the specified range, repair the control circuit for an open/high resistance.

5. Ignition ON, test for less than 0.3 V between the control circuit terminal 1 and ground.

⇒	If greater than the specified range, repair the control circuit for a short to voltage.

6. Ignition OFF, test for less than 5 Ω between the Q38 Throttle Body control circuit terminal 2 and K20 Engine Control Module terminal 84.

⇒	If greater than the specified range, repair the control circuit for an open/high resistance.

7. Test for less than 5 Ω between the control circuit terminal 2 and ground.

⇒	If greater than the specified range, repair the control circuit for an open/high resistance.

8. Ignition ON, test for less than 0.3 V between the control circuit terminal 2 and ground.

⇒	If greater than the specified range, repair the control circuit for a short to voltage.

9. If all circuits test normal, perform the Component Testing before replacing the K20 Engine Control Module.

Inlet Air Flow Valve Position Sensor

1. Ignition OFF, disconnect the harness connector at the Q38 Throttle Body.
2. Test for less than 5 Ω between the ground circuit terminal 4 and ground.

⇒	If greater than the specified range, repair the ground circuit for an open/high resistance.

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 5 and ground.

⇒	If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

4. Verify the scan tool Inlet Air Flow Valve Position Sensor parameter is less than 0.3 V.

⇒	If greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.

5. Install a 3 A fused bridging wire between the signal circuit terminal 3 and the 5 V reference circuit terminal 5. Verify the scan tool Inlet Air Flow Valve Position Sensor parameter is at 4.8-5.2 V.

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

6. If all circuits test normal, replace the Q38 Throttle Body.

Static Test

1. Ignition OFF, disconnect the harness connector at the Q38 Throttle Body.
2. Test for 2-3 Ω between the control circuit terminal 1 and the control circuit terminal 2.

⇒	If not within the specified range, replace the Q38 Throttle Body.

3. Test for infinite resistance between each terminal and the Q38 Throttle Body housing.

⇒	If not the specified value, replace the Q38 Throttle Body.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.