OBD-II code · Powertrain (generic)
P0CA8 Hybrid/EV Battery Temperature Sensor M Circuit
The HV battery temperature sensor M reports a circuit fault. Cell-group temperature monitoring impaired on this channel.
Is it safe to drive with P0CA8?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyTemperature sensor failed
- PossibleWiring fault
- 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
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Temp Sensor M, Wiring Harness, Bms
Related codes
- P0C7CHybrid/EV Battery Temperature Sensor G Circuit
- P0C81Hybrid/EV Battery Temperature Sensor H Circuit
- P0C88Hybrid/EV Battery Temperature Sensor I Circuit
- P0C8DHybrid/EV Battery Temperature Sensor J Circuit
- P0C92Hybrid/EV Battery Temperature Sensor K Circuit
- P0C97Hybrid/EV Battery Temperature Sensor L Circuit
- P0CADHybrid/EV Battery Temperature Sensor N Circuit
- P0CB2Hybrid/EV Battery Temperature Sensor O Circuit
- P0CB7Hybrid/EV Battery Temperature Sensor P Circuit
- P0CA5Hybrid/EV Battery Discharging Voltage High
- P0CA6Hybrid/EV Battery Charging Current High
- P0CA7Hybrid/EV Battery Discharging Current High
- P0CA9Hybrid/EV Battery Temperature Sensor M Range/Performance
- P0CAAHybrid/EV Battery Temperature Sensor M Circuit Low
- P0CABHybrid/EV Battery Temperature Sensor M Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.