P0A8E

DTC P0A8D-P0A8F

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 provides an overview of each diagnostic category.

DTC Descriptor
DTC P0A8D
- 14 V Power Module System Voltage Low Voltage

DTC P0A8E
- 14 V Power Module System Voltage High Voltage

DTC P0A8F
- 14 V Power Module System Performance

Circuit/System Description

The 14V power module, also referred to as the accessory DC power control module, constantly monitors system input and output voltage. This sensor is internal to the 14V power module and is not serviced separately from the control module.

Conditions for Running the DTC

The vehicle is ON.

Conditions for Setting the DTC

DTC P0A8D, P0A8E, or P0A8F: The sensor signal is out of range for greater than 5 seconds.

Action Taken When the DTC Sets

* The 14V power module stops supplying power to the 12V system.
* DTCs P0A8D, P0A8E, or P0A8F are Type C DTCs.

Conditions for Clearing the DTC

DTCs P0A8D, P0A8E, or P0A8F are Type C DTCs.

Diagnostic Aids

This DTC may set due to low 12 V system voltage.

Reference Information
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

If the DTC is set, program the K1 14V power module. If the DTC resets, replace the K1 14V power module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Programming and Relearning for Accessory DC Power Control Module, also called the 14V power module, replacement, programming, and setup.