Check Engine Codes / P0606
P0606 Code
PCM/ECM Processor Fault
What it means
The engine computer failed its own self-test. Rare, and occasionally caused by voltage problems rather than the computer itself.
Can you keep driving?
Depends on symptoms — may run fine or may stall/no-start.
Common causes
Listed most-common first. Fix cost depends on which one it turns out to be — check your quote free below.
⚠️ Don't get ripped off
Before replacing an expensive PCM computer outright, a good shop rules out power/ground issues to the PCM and checks for reflash bulletins first. Ask specifically about both.
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Related codes
Informational only — codes share symptoms across vehicles, so proper diagnosis on your specific car always comes first.