OBD-II code · Powertrain (generic)
P0E19 Hybrid/EV Battery Pack Coolant Heater B Control Performance
The HV battery pack coolant heater B reports a control performance condition. Battery preheating may be impaired in cold weather.
Is it safe to drive with P0E19?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyHeater element aged - low output
- PossibleSupply voltage low under load
- Less likelyPack cell imbalance approaching service threshold
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Pack Coolant Heater B, Wiring Harness, Bms
Related codes
- P0E15Hybrid/EV Battery Pack Coolant Heater A Control Performance
- P0E16Hybrid/EV Battery Pack Coolant Heater B Control Circuit/Open
- P0E17Hybrid/EV Battery Pack Coolant Heater B Control Circuit Low
- P0E18Hybrid/EV Battery Pack Coolant Heater B Control Circuit High
- P0E1AHybrid/EV Battery Pack Coolant Pump B Control Circuit/Open
- P0E1BHybrid/EV Battery Pack Coolant Pump B Control Circuit Low
- P0E1CHybrid/EV Battery Pack Coolant Pump B Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.