What are the common causes of P06B8?

Corrupted non volatile memory data in the PCM. A failing battery or unstable supply voltage. Water damage at the PCM or its connectors. An incomplete PCM programming or calibration.

Check battery voltage and the charging system output. Inspect the PCM connectors and grounds. Reprogram or reflash the PCM. Replace the PCM if the NVRAM fault returns. Clear the code and retest.

P06B8

Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error

System: Computer output circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P06B8 means Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error.

Where it lives

For P06B8, the part to look at first is the module named here.

Check these first

Corrupted non volatile memory data in the PCM
A failing battery or unstable supply voltage
Water damage at the PCM or its connectors
An incomplete PCM programming or calibration

What to do next

Check battery voltage and the charging system output
Inspect the PCM connectors and grounds
Reprogram or reflash the PCM
Replace the PCM if the NVRAM fault returns
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.