OBD-II code · Powertrain (generic)
P0D21 Battery Charger A Output Voltage Too Low
Battery charger A reports a output voltage too low condition. HV charging operation may be impaired.
Is it safe to drive with P0D21?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyLoad exceeds charger capacity
- PossibleIncreased internal loss
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 A, Wiring Harness, Bms
Related codes
- P2E3BBattery Charger B Output Voltage Too Low
- P0D1EHybrid/EV Battery Pack Coolant Control Valve B Control Circuit High
- P0D1FControl Module Date/Time Synchronization Error
- P0D20Battery Charger A Output Voltage Performance
- P0D22Battery Charger A Output Current Performance
- P0D23Battery Charger A Output Shorted
- P0D24Battery Charger A Temperature Too High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.