A throttle plate actuator is used to achieve high exhaust gas recirculation rates. It increases the pressure difference between exhaust and intake so that the appropriate exhaust quantity can be mixed with the intake 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 the airflow deviation is above or below a calibrated amount during the regeneration process.

DTC P02E1 is Type A DTC.

DTC P02E1 is Type A 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 blade from 0-95 percent with a scan tool. The throttle blade should respond to the scan tool commands.
2. Observe the DTC information with a scan tool. DTC P02E1 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.

1. Ignition OFF, inspect for the following:

•	Intake system/charge air hoses for leaks/restrictions

•	Exhaust system/turbo charger for leaks/restrictions

•	Air filter for restrictions

⇒	If a condition is found, repair as necessary.

2. Ignition OFF, and the MAIN fuse removed, disconnect the harness connector at the throttle body assembly.
3. Test for less than 5 ohms between the ground circuit terminal 1 and ground.

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

4. Install the MAIN fuse. Ignition ON, test for B+ between the battery voltage circuit terminal 2 and ground.

⇒	If less than the specified range, repair the B+ circuit for an open/high resistance.

5. Connect a test lamp between the throttle blade control circuit terminal 3 and B+.
6. Command the throttle blade from 0-95 percent with a scan tool. The test lamp should respond to the scan tool commands.

⇒	If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.

⇒	If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.

7. If all circuits test normal, replace the throttle body assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.