OBD-II code · Powertrain (generic, extended)
P2E31 Battery Charger B Module Supply Voltage High
The supply voltage to battery charger B control module is high. Charger may not start or operate reliably.
Is it safe to drive with P2E31?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyAlternator overvoltage
- PossibleWire shorted to B+
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Battery Charger B Control Module, Wiring Harness
Related codes
- P2E2EBattery Charger A Module Supply Voltage High
- P2E2FBattery Charger B Module Supply Voltage Performance
- P2E30Battery Charger B Module Supply Voltage Low
- P2E32Battery Charger A Module Forced Shutdown Voltage Performance
- P2E33Battery Charger A Module Forced Shutdown Voltage Low
- P2E34Battery Charger A Module Forced Shutdown Voltage High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.