Powertrain
generic / SAE
P0603
Internal Control Module Keep Alive Memory (KAM) Error
The ECU detected a fault in its KAM (battery-backed memory used to store adaptations and DTCs). Often appears after battery disconnect or low battery; persistent codes indicate an internal ECU fault.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 03
Possible causes
- Battery disconnected or voltage too low high
- ECU internal memory fault 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- Module software outdated, reflash may resolve low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: easy
- DIY: possible
- Estimated cost: 80–800 €
- Estimated time: 0.1–4 h
- Component: ecm
- Component: vehicle battery
- MIL / check engine light
Sources
References
sae:J2012