Engine-Codes - Cadillac - P0AC4 Cadillac

P0AC4 Cadillac Code - Hybrid Powertrain Control Module Requested MIL Illumination

- Code Popularity: 4,023 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

What are the Possible Causes of the Code P0AC4 Cadillac?

  • Check Hybrid Powertrain Control Module for codes
  • Faulty Hybrid Powertrain Control Module

How to Fix the P0AC4 Cadillac Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Code P0AC4 Cadillac Tech Notes

The P0AC4 code is an information code only, if there are no other engine codes, then the Hybrid Powertrain Control Module needs to be diagnose.

What is the Cost to Diagnose the Code P0AC4 Cadillac?

Labor: 1.0

The cost to diagnose the P0AC4 Cadillac code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Cadillac have Safety Recalls? → Check here

What are Code P0AC4 Cadillac Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0AC4 Cadillac Code Mean?

Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. If a condition is detected, the module sets a Diagnostic Trouble Code (DTC) and sends a serial data message to the Engine Control Module (ECM). The ECM sets a DTC to inform that the module has set a DTC. The serial data message sent by the module also contains a request for the ECM to illuminate the Malfunction Indicator Lamp (MIL).
The DTC will be set when the ECM receives a serial data message from the Hybrid Powertrain Control Module indicating that DTC has been set in the module.

P0AC4 Cadillac Code - Hybrid Powertrain Control Module Requested MIL Illumination

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