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 (IA) Flow Position Sensor PerformanceDiagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage |
|---|---|---|---|---|
IA Flow Valve 5-Volt Reference Voltage | P0642 | P02E9 | P02E8 | P0336, P0643 |
IA Flow Valve Sensor Signal | P02E8 | P02E7 | P02E8 | P02E9 |
IA Flow Valve Low Reference | -- | P02E7 | P02E9 | -- |
IA Flow Valve Motor Control 1 | P02E0 | -- | P02E0 | P02E0 |
IA Flow Valve Motor Control 2 | P02E0 | -- | P02E0 | P02E0 |
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 B DTC. |
| • | Diesel particulate filter (DPF) regeneration is inhibited. |
Conditions for Clearing the DTC
DTC P02E7 is a Type B DTC.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
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/Failure 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
| • | Refer to Control Module References for ECM replacement, setup and programming. |
Repair Verification
- Install any components or connectors that have been removed or replaced during diagnosis.
- Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.
- Clear the DTCs.
- Turn OFF the ignition for 90 seconds.
- Duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List - Vehicle and perform the appropriate diagnostic procedure.
- Perform the Diesel Particulate Filter (DPF) Service Regeneration.
