P02E7

DTC P02E7

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 P02E7
- Diesel Intake Air (AI) Flow Position Sensor Performance

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

* DTCs P02E0, P02E8, P02E9, P0642 or P0643 are not set.
* DTC P02E7 runs continuously while the IA valve is actively being controlled.

Conditions for Setting the DTC

The difference between the desired IA Valve position and the actual IA Valve position is more than 3 percent for 10 seconds.

Action Taken When the DTC Sets

DTC P02E7 is a Type A DTC.

Conditions for Clearing the DTC

DTC P02E7 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 100 percent and 0 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

Measure the following circuits for high resistance:

* Low reference circuit
* Signal circuit

• If high resistance is found, repair the affected circuit.
• If no resistance is found, replace the IA valve.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Refer to Programming and Relearning Programming and Relearning
* Intake Air Valve Replacement Verification Tests