OBD-II code · Powertrain (generic)
P0AAC Hybrid/EV Battery Pack Air Temperature Sensor A Circuit
The ECM detects a circuit fault on the hybrid/ev battery pack air temperature sensor a circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0AAC?
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 Pack Air Temp Sensor A, Wiring Harness, Bms
Related codes
- P0AB1Hybrid/EV Battery Pack Air Temperature Sensor B Circuit
- P0AA9Hybrid/EV Battery Voltage Isolation Sensor Circuit Low
- P0AAAHybrid/EV Battery Voltage Isolation Sensor Circuit High
- P0AABHybrid/EV Battery Voltage Isolation Sensor Circuit Intermittent/Erratic
- P0AADHybrid/EV Battery Pack Air Temperature Sensor A Circuit Range/Performance
- P0AAEHybrid/EV Battery Pack Air Temperature Sensor A Circuit Low
- P0AAFHybrid/EV Battery Pack Air Temperature Sensor A Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.