Chevrolet P1AC9: HCM Service Calibration Fault

Is your scanner showing Chevrolet P1AC9?
No worries. We'll show you what it means and how to deal with it.

Presented by
OBD Codex, Administrator

Chevrolet P1AC9: HCM Service Calibration Fault

DIY Difficulty Level
Repair Cost
Can I Still Drive?

What Does The Chevrolet P1AC9 Code Mean?

This code indicates that the internal fault detection is handled inside the control module. No external circuits are involved.

Conditions for setting the DTC:

  • The module has received voltage on the ignition 0 voltage circuit.
  • The module has turned ON and no configuration DTC are present.
  • This diagnostic shall be run every 100 ms.
  • Reference voltage is stable and accurate.

What Are The Potential Causes Of The Chevrolet P1AC9 Code?

  • Faulty Hybrid Control Module (HCM)
  • Hybrid Control Module (HCM) harness is open or shorted
  • Hybrid Control Module (HCM) circuit poor electrical connection

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> KAIWEETS Digital Multimeter

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Chevrolet P1AC9, DTCDECODE.

Tagged :
You know someone would like this

Leave a comment

Your email address will not be published. Required fields are marked *