Engine-Codes - Generic - P0AC4

P0AC4 Code - Hybrid Powertrain Control Module Requested MIL Illumination

- Code Popularity: 67,130 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P0AC4?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Check Hybrid Powertrain Control Module for codes
  • Faulty Hybrid Powertrain Control Module

Code 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.

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How to Fix the DTC P0AC4?

Check 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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

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

What are Code Possible Symptoms?

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

What Does the P0AC4 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 Code - Hybrid Powertrain Control Module Requested MIL Illumination

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Code P0AC4 Information for Specific Makes

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