Engine-Codes - Chevrolet - P0AC4 CHEVROLET

P0AC4 CHEVROLET - Hybrid Powertrain Control Module Requested MIL Illumination

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0AC4 CHEVROLET Possible Causes

  • Faulty Hybrid Powertrain Control Module
  • Hybrid Powertrain Control Module harness is open or shorted
  • Hybrid Powertrain Control Module circuit poor electrical connection

How is the P0AC4 CHEVROLET code repair?

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.

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 P0AC4 CHEVROLET code

Labor: 1.0

The cost to diagnose the P0AC4 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Possible Symptoms

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


The P0AC4 code indicates the Hybrid Powertrain Control Module has set an emission related hybrid powetrain code.The Hybrid Powertrain Control Module sends a message via serial data circuit to the Engine Control Module (ECM) requesting illumination of the Malfunction Indicator Light (MIL). When the ECM receives the message, the code P0AC4 code will set. The P0AC4 code information for the ECM will only display the P0AC4 code,but freeze frame/failure records data may display the hybrid powertrain code that sets.

More Information

Need more information on how to fix the P0AC4 CHEVROLET code?
Get Access to Factory Service Manuals

Need more help?

Get the P0ac4 Chevrolet code diagnosed by a professional: Find a repair shop in your area