Powertrain
generic / SAE
P0606
ECM/PCM Processor Fault
The ECU's internal processor self-test has failed. This is a hard module fault — the ECU usually triggers limp-home mode and may not respond to scan tools fully until replaced or repaired.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 06
Possible causes
- Internal processor or memory failure high
- Water ingress / corrosion in module low
- Module software outdated, reflash may resolve low
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1–8 h
- Component: ecm
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012