P0A30Drive Motor B Temperature Sensor Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A30 is the general circuit code for the temperature sensor in the second traction motor (motor B). It is meant for faults the control unit can see on the sensor line but cannot classify as too low, too high or implausible. No manufacturer documents P0A30 publicly; GM two-mode hybrids and Mitsubishi (rear motor of the 2023 Outlander PHEV) use the specific codes P0A31 to P0A33 for the same sensor instead. CARB 1968.2 requires hybrid components whose failure can affect emissions to be monitored for circuit faults. Without a valid winding temperature the motor cannot be protected against overheating, so the system usually cuts electric drive power and lights a hybrid warning.
- What you may notice
- Hybrid system warning or check engine light
- Reduced electric drive power
- Motor B temperature missing or implausible in live data
- Likely causes
- LikelyLoose, corroded or damaged connector between motor B and its control module
- PossibleChafed or broken sensor wiring at the drive unit
- PossibleThermistor in the motor winding failed (often only replaceable with the motor)
- RareFaulty sensor input in the motor control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.