Powertrain
generic / SAE
P0A31
Drive Motor B Temperature Sensor Circuit Range/Performance
The ECM detects a circuit range/performance fault on the drive motor b temperature sensor. Reading cannot be used reliably for control.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberA / 31
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 motor power or torque
- Possible limp mode or vehicle shutdown
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–300 €
- Estimated time: 0.3–1.5 h
- Component: drive motor b temp sensor
- Component: wiring harness
- Component: hybrid control module
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012