OBD-II code · Powertrain (generic)
P0AC5 Hybrid/EV Battery Temperature Sensor B Circuit
The ECM detects a circuit fault on the hybrid/ev battery temperature sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0AC5?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor failed
- PossibleWiring or connector 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
- Easy
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Temp Sensor B, Wiring Harness, Bms
Related codes
- P0A9BHybrid/EV Battery Temperature Sensor A Circuit
- P0ACAHybrid/EV Battery Temperature Sensor C Circuit
- P0AE8Hybrid/EV Battery Temperature Sensor D Circuit
- P0BC2Hybrid/EV Battery Temperature Sensor E Circuit
- P0C33Hybrid/EV Battery Temperature Sensor F Circuit
- P0AC2Hybrid/EV Battery Pack Current Sensor A Circuit High
- P0AC3Hybrid/EV Battery Pack Current Sensor A Circuit Intermittent/Erratic
- P0AC4Hybrid/EV Powertrain Control Module Requested MIL Illumination
- P0AC6Hybrid/EV Battery Temperature Sensor B Circuit Range/Performance
- P0AC7Hybrid/EV Battery Temperature Sensor B Circuit Low
- P0AC8Hybrid/EV Battery Temperature Sensor B Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.