EV Diagnostics
Verified EV diagnostic knowledge page

Chevrolet P0A0C

lock circuit low? may be set. A ?Shift To Park? message may also be displayed. Additionally, a subset of these

DriveNot yet established by verified evidence. However, the verified manufacturer communication states the condition could result in loss of vehicle propulsion.
ChargeNot yet established by verified evidence.
ServiceContact a Chevrolet dealer or qualified Chevrolet service provider for diagnosis, particularly if the vehicle has loss of propulsion, a no-start condition, or a displayed “Shift To Park” message.
Confidence95%

Quick answer

For a 2017 Chevrolet Volt in the US, DTC P0A0C is documented in an official NHTSA-hosted Chevrolet manufacturer communication as “high voltage system inter-lock circuit low.” The communication states it could result in loss of propulsion and/or a no-start condition, and a “Shift To Park” message may be displayed.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

DTC Chevrolet P0A0C Short ExplanationMaxidot Chevrolet

Videos are supporting material and never override OEM or regulator evidence.

1. What does P0A0C mean?

For a 2017 Chevrolet Volt in the US, DTC P0A0C is documented in an official NHTSA-hosted Chevrolet manufacturer communication as “high voltage system inter-lock circuit low.” The communication states it could result in loss of propulsion and/or a no-start condition, and a “Shift To Park” message may be displayed.

2. Technical explanation

Verified evidence identifies P0A0C as a high-voltage system inter-lock circuit low condition in the cited manufacturer communication. The supplied excerpt does not establish the specific failed component, diagnostic procedure, or repair.

3. What system is affected?

High-voltage system inter-lock circuit.

4. How serious is this code?

Potentially significant. The verified manufacturer communication states the condition could result in loss of vehicle propulsion and/or a no-start condition.

5. Symptoms you may notice

  • Malfunction indicator lamp may be illuminated.
  • DTC P0A0C may be set.
  • A “Shift To Park” message may be displayed.
  • Loss of vehicle propulsion may occur.
  • A no-start condition may occur.

6. Possible causes

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence. However, the verified manufacturer communication states the condition could result in loss of vehicle propulsion.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • If propulsion is lost or the vehicle will not start, arrange appropriate service rather than relying on continued operation.
  • Have the vehicle evaluated by a qualified Chevrolet service provider.
  • Do not attempt high-voltage system repairs yourself.

10. Step-by-step troubleshooting

  1. Confirm whether P0A0C is present using appropriate diagnostic equipment.
  2. Record any malfunction indicator lamp status and any “Shift To Park” message for the service provider.
  3. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Contact a Chevrolet dealer or qualified Chevrolet service provider for diagnosis, particularly if the vehicle has loss of propulsion, a no-start condition, or a displayed “Shift To Park” message.

12. What the service center may check

  • Retrieve and confirm DTC P0A0C.
  • Inspect and diagnose the high-voltage system inter-lock circuit according to applicable Chevrolet service information. Specific checks are not provided in the supplied evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 10156979: 16185, published August 15, 2017. The supplied excerpt references P0A0C, possible loss of propulsion and/or no-start, possible malfunction indicator lamp illumination, and a possible “Shift To Park” message. Exact bulletin remedy and full applicability are not established by the supplied evidence.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA-hosted Chevrolet manufacturer communication 10156979: 16185, published 2017-08-15: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2015-2019.zip#nhtsa_id=10156979. Verified applicability supplied: 2017 Chevrolet Volt, US.

19. Frequently asked questions

What does P0A0C mean on a 2017 Chevrolet Volt?

The verified manufacturer communication describes P0A0C as “high voltage system inter-lock circuit low.”

Can P0A0C cause a Chevrolet Volt not to start?

Yes. The verified manufacturer communication states the condition could result in a no-start condition.

Can P0A0C cause loss of propulsion?

The verified manufacturer communication states the condition could result in loss of vehicle propulsion.

Will a Shift To Park message appear with P0A0C?

It may. The verified manufacturer communication states that a “Shift To Park” message may also be displayed.

What repair fixes P0A0C?

Not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Chevrolet P0A0C: lock circuit low? may be set. A ?Shift To Park?… | EV Diagnostics