Powertrain
generic / SAE
P2D78
Battery Charger Control Module B Processor Performance
The battery charger control module B reports a processor performance fault. CPU watchdog or RAM check failed.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberD / 78
Possible causes
- CPU watchdog repeatedly resets high
- RAM check failed medium
- Module software outdated, reflash may resolve low
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 500–3000 €
- Estimated time: 2–8 h
- Component: battery charger cm b
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012