P02E0

DTC P02E0

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 Descriptor

DTC P02E0
- Diesel Intake Air (IA) Flow Control Circuit

Diagnostic Fault Information






Circuit/System Description

The intake air (IA) valve is a normally open valve and is only operated during a DPF regeneration. The position of the IA valve is controlled by the engine control module (ECM). The IA valve system uses a position sensor located within the valve assembly to monitor the position of the valve. The position sensor has the following circuits:

* 5-volt reference circuit
* Low reference circuit
* Signal circuit

The IA valve uses a motor to move the valve to a closed position and spring tension returns it to the open position. The motor has the following circuits:

* Motor control 1 circuit
* Motor control 2 circuit

Conditions for Running the DTC

* The ECM is powered up for more than 0.5 second.
* The IA valve duty cycle is greater than 10 percent.
* DTC P02E0 runs continuously.

Conditions for Setting the DTC

* The IA valve duty cycle is greater than 10 percent.
* The IA valve control circuit is less than 25 mA.

Action Taken When the DTC Sets

DTC P02E0 is a Type A DTC.

Conditions for Clearing the DTC

DTC P02E0 is a Type A DTC.

Circuit/System Verification

* Command the IA valve from 100 percent to 0 percent. The IAF Valve Commanded Position and the IAF Valve Position parameter should match.
* After the engine has been running, turn OFF the ignition. Observe the IA Valve Position parameter fluctuates between 0 percent and 100 percent several times.
* 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 Records data.

Circuit/System Testing

1. With the ignition OFF, disconnect the ECM and the IAF valve. Test the following circuits for a short to voltage, short to ground, or open/high resistance.

* AI Motor Control 1
* AI Motor Control 2

• If a condition is found repair the affected circuit.

2. Connect the ECM. Ignition ON, and the IAF disconnected, measure for 12 volts between the following circuits and ground:

* AI Motor Control 1 terminal A
* AI Motor Control 2 terminal B

• If voltage is less than 12 volts on either circuit, replace the ECM.
• If the voltage is 12 volts on both circuits, replace the IAF valve.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Control Module References for ECM replacement, setup and programming. Programming and Relearning
* Intake Air Valve Replacement Verification Tests