gerhardbrown79

Volt Fault Memory Lock Active Error

I've got a 2014 Chevy Volt, hybrid engine, with about 178k km on it. I'm getting a 'Fault memory lock active' error. The only symptom I'm seeing is that the error is stored in the error memory. I'm suspecting it's possibly undervoltage, but I'm not entirely sure. Anyone else run into this?

A 2014 Chevy Volt owner encountered a 'Fault memory lock active' error, suspecting it might be due to undervoltage. The issue was confirmed to be related to undervoltage after a local shop inspection. The fault memory was cleared, and the vehicle's computer system was checked, resolving the problem.

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4 comment(s)

I had something similar happen with my Volt, though I can't remember the exact error code. Was yours throwing any other weird codes along with it? Have you checked the 12V battery?

Thanks for the quick reply! No other codes are showing up. Just the 'Fault memory lock active' one. I haven't checked the 12V battery yet. Could a weak 12V battery really cause that kind of ECU fault?

Yeah, a weak 12V can cause all sorts of strange electronic issues in these cars. It's worth checking before you go down the rabbit hole of ECU diagnostics. But honestly, with that error and mileage, a trip to a workshop to check the ECU could be worth it.

Thanks a lot for the insight! I took it to a local shop, and you were right – it was related to undervoltage. They cleared the fault memory and checked the computer system for 240€. Seems to be running fine now!

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CHEVROLET

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VOLT