Powertrain
generic / SAE
P0A9C
Hybrid/EV Battery Temperature Sensor A Circuit Range/Performance
The ECM detects a circuit range/performance fault on the hybrid/ev battery temperature sensor a circuit. Reading cannot be used reliably for control.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / 9C
Possible causes
- Sensor characteristic drifted high
- Sensor mounting displaced medium
- Sensor element aged beyond calibration window low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: easy
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.5–3 h
- Component: hybrid battery temp sensor a
- Component: wiring harness
- Component: bms
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012