P02E9
DTC P02E7-P02E9
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provide an overview of each diagnostic category.
DTC Descriptors
DTC P02E7
- Intake Air (IA) Flow Valve Position Sensor Performance
DTC P02E8
- Intake Air (IA) Flow Valve Position Sensor Circuit Low Voltage
DTC P02E9
- Intake Air (IA) Flow Valve Position Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The throttle body is a normally open valve and is only operated during Diesel Particulate Filter (DPF) regeneration and when maintaining selective catalyst reduction temperature. The throttle body contains a digital position sensor. The position sensor is mounted within the throttle body and is not serviceable. The position sensor provides a signal voltage that changes relative to throttle body valve angle. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit , a low reference circuit, and a serial data circuit or position sensor signal. The position sensor information is transmitted between the throttle body and the ECM on the serial data circuit.
The throttle body uses a motor to move the valve to an open or closed position.
Conditions for Running the DTC
P02E7
* The engine speed is greater than 600 RPM for greater than 10 s.
* The engine is not in afterun mode.
* The charge air cooler temperature is less than 199°C (390°F).
* DTC P02E7 runs continuously when the above conditions are met.
P02E8 and P02E9
* The engine speed is greater than 600 RPM for greater than 10 s.
* The engine is not in afterun mode.
* DTC P02E8 and P02E9 run continuously when the above conditions are met.
Conditions for Setting the DTC
P02E7
The ECM detects that the difference between the desired throttle valve position and the actual throttle valve position is greater than 10 % for 10 s.
P02E8
The ECM detects that the throttle valve position sensor voltage is less than 0.25 V for 5 s.
P02E9
The ECM detects that the throttle valve position sensor voltage is greater than 4.75 V for 5 s.
Action Taken When the DTC Sets
P02E7
DTC P02E7 is a Type B DTC.
P02E8 and P02E9
* DTCs P02E8 and P02E9 are Type A DTCs.
* The driver information center may display Service Emissions System message.
* DPF regeneration is inhibited.
Conditions for Clearing the DTC
P02E7
DTC P02E7 is a Type B DTC.
P02E8 and P02E9
DTCs P02E8 and P02E9 are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (LGH or LML) [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, observe the scan tool DTC information. DTC P02E2, P02E3, P02EB, P0697, P122C, P122E, P122F, P16A0, P16A1 or P16A2 should not be set.
• If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
2. Engine idling, observe the scan tool IAF Valve Pos. Sensor voltage parameter. The reading should be between 3.7-4.7 V.
• If not within the specified range, replace the Q38 throttle body
3. Turn OFF the ignition while observing the scan tool IA Flow Valve Position parameter. The parameter should fluctuate between 100 % and 0 % several times.
• If the parameter does not fluctuate as specified, replace the Q38 throttle body
4. 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.
Repair Instructions
* Throttle Body Assembly Replacement Service and Repair
* Perform the scan tool Diesel Particulate Filter (DPF) Regeneration Enable Diesel Particulate Filter (DPF) Regeneration Enable procedure if the scan tool DPF Soot Mass is less than 30 g. If the scan tool DPF Soot Mass is 30 g or greater, perform the Diesel Particulate Filter (DPF) Service Regeneration Diesel Particulate Filter (DPF) Service Regeneration procedure.
* Control Module References Control Module References for ECM replacement, programming and setup
Repair Verification
1. Install any components or connectors that have been removed or replaced during diagnosis.
2. Perform any adjustment, programming or setup procedures that are required when a component or module is removed or replaced.
3. Clear the DTCs.
4. Ignition OFF, all vehicle systems OFF, including retained accessory power (RAP) and the scan tool. This may take up to 2 minutes.
5. 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 Diagnostic Trouble Code (DTC) List - Vehicle
6. Perform the Reductant System Malfunction Warning Test Reductant System Malfunction Warning Test with a scan tool in order to clear the Service Emission System message, if illuminated.
• If the Service Emission System message does not turn OFF, a condition with the system still exists.