P060A
Internal Control Module Monitoring Processor Performance
Modern ECUs have a separate watchdog or monitoring processor that supervises the main processor. This processor reports a self-diagnosis fault - typically a watchdog event, ROM/RAM mismatch, or check-sum error in its monitor section. The ECU runs in a safety-fallback mode until repair.
- Check engine light: Yes
- Emissions related: No
- 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.
- Monitor processor internal faultCommon
- Module software outdated, reflash may resolveLess likely
- Supply voltage outside specificationLess likely
Parts involved
- ECU Monitoring Processor
P060A 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.