P1A91

DTC P1A90-P1A92

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 P1A90
- 14 Volt Power Module Temperature Sensor 1 Performance

DTC P1A91
- 14 Volt Power Module Temperature Sensor 1 Circuit Low Voltage

DTC P1A92
- 14 Volt Power Module Temperature Sensor 1 Circuit High Voltage

Circuit/System Description

The 14V power module, also called the accessory DC power control module, constantly monitors system temperature, to protect against overheat conditions. The module also monitors the function of the temperature sensors. These sensors are internal to the 14V power module and are not serviced separately from the control module.

Conditions for Running the DTC

The vehicle is ON.

Conditions for Setting the DTC

DTC P1A90, P1A91, or P1A92: The sensor signal is out of range for greater than 5 seconds.

Action Taken When the DTC Sets

DTCs P1A90, P1A91, or P1A92 are Type C DTCs.

Conditions for Clearing the DTC

DTCs P1A90, P1A91, or P1A92 are Type C DTCs.

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.