OBD-II code · Powertrain (generic)
P0AF4 Drive Motor Inverter Temperature Sensor B Circuit Low
The ECM detects a circuit low fault on the drive motor inverter temperature sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0AF4?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
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
- Drive Motor Inverter Temp Sensor B, Wiring Harness, Hybrid Control Module
Related codes
- P0AEFDrive Motor Inverter Temperature Sensor A Circuit Low
- P0BD3Drive Motor Inverter Temperature Sensor C Circuit Low
- P0BD8Drive Motor Inverter Temperature Sensor D Circuit Low
- P0BDDDrive Motor Inverter Temperature Sensor E Circuit Low
- P0BE2Drive Motor Inverter Temperature Sensor F Circuit Low
- P0AF1Drive Motor Inverter Temperature Sensor A Circuit Intermittent/Erratic
- P0AF2Drive Motor Inverter Temperature Sensor B Circuit
- P0AF3Drive Motor Inverter Temperature Sensor B Circuit Range/Performance
- P0AF5Drive Motor Inverter Temperature Sensor B Circuit High
- P0AF6Drive Motor Inverter Temperature Sensor B Circuit Intermittent/Erratic
- P0AF714 Volt Power Module Internal Temperature Too High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.