OBD-II code · Powertrain (generic, extended)
P2D77 Battery Charger Control Module B Performance
The battery charger control module B reports a performance fault. Internal self-tests fail or response time outside calibration.
Is it safe to drive with P2D77?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyInternal module fault
- PossibleCommunication with BMS degraded
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Battery Charger Cm B, Bms
Related codes
- P0D67Battery Charger Control Module A Performance
- P2D74Battery Charging System Negative Contactor D Control Circuit Range/Performance
- P2D75Battery Charging System Negative Contactor D Control Circuit Low
- P2D76Battery Charging System Negative Contactor D Control Circuit High
- P2D78Battery Charger Control Module B Processor Performance
- P2D79Charging Stop Switch Circuit
- P2D7ACharging Stop Switch Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.