Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error
What it means
P06B8 means the engine/powertrain control module ran a self-check and found a fault in its NVRAM — the memory that holds learned settings and data when the ignition is off. It is often triggered by low battery voltage, a poor ground, or an interrupted software update rather than a truly bad computer. Effects range from none to stalling or a no-start, so check power and grounds first before condemning the module.
Can I keep driving? Varies — a memory fault in the engine computer can be harmless or can cause stalling, hard starting, or a no-start, so have it checked before relying on the car.
Common symptoms
What you'll notice
- Check-engine light on
- Stalling, hard starting, or a no-start in severe cases
- Rough or inconsistent running as adaptive settings are lost
- Module may fail to retain learned data or communicate reliably
Common causes
Most likely first
- Low or unstable battery voltage, or a poor battery groundLikely
- Corroded or loose ECM/PCM connectorsCommon
- Interrupted or failed software reflash / programmingCommon
- Internal ECM/PCM memory faultLess often
How to diagnose & fix
Work through it in order
- Test the battery and charging system, and clean the main grounds and ECM connectors.
- Confirm the module has the correct, up-to-date software; reflash if a programming error is suspected.
- Clear the code and re-test to see whether it was a one-time glitch from a voltage event.
- If it returns with power and grounds verified good, the module's memory has failed and it must be reprogrammed or replaced.
FAQ
Quick answers
Is it safe to drive with P06B8?+
Can I just clear P06B8?+
Related codes
Often seen with P06B8
Read & clear P06B8 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.