P0607
Control Module Performance
The ECM performs an internal self-test and detects a processor or memory performance fault that does not fit the more specific P0601 to P0606 codes.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Common causes
Ordered by how often each turns out to be the cause.
- ECM internal performance faultCommon
- Unstable supply voltagePossible
- Module software outdated, reflash may resolveLess likely
Parts involved
- ECM
P0607 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.