OBD-II code · Powertrain (generic, extended)
P2E91 Battery Charger B Internal Power Supply Performance
The internal low-voltage power supply of battery charger B does not maintain the expected output. Internal regulator drift or overload.
Is it safe to drive with P2E91?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyInternal regulator drifted
- PossibleInternal load increased
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 B Internal Psu
Related codes
- P2E90Battery Charger A Internal Power Supply Performance
- P2E8EBattery Charger B Charge Sequence Signal 2 Circuit High
- P2E8FBattery Charger B Charge Sequence Signal 2 Circuit Low
- P2E92Charge Port Door B Open Request Switch Wake-Up Circuit
- P2E93Charge Port Door B Open Request Switch Circuit
- P2E94Charge Port Door B Open Request Switch Circuit Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.