P0A32Drive Motor B Temperature Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A32 means the motor B temperature signal sits below its valid voltage range. GM uses an NTC thermistor, so a voltage near 0 V reads as an impossibly hot winding: the 2011 hybrid tables set it above 184 °C (Type A, one trip), the 2013 two-mode trucks above 230 °C (Type B, two trips). Mitsubishi sets it on the rear motor of the 2023 Outlander PHEV when the sensor voltage is 0.065 V or less for 0.5 s. A signal wire shorted to ground or a shorted thermistor is the typical cause. P0A33 is the opposite fault, P0A31 the plausibility check, and P0A35 a real over-temperature that GM only evaluates while no out-of-range fault is active. The system derates electric drive and warns the driver.
- What you may notice
- Hybrid warning or check engine light
- Motor B temperature shows an extremely high fixed value
- Electric drive reduced or switched off
- Likely causes
- LikelySensor signal wire shorted to ground
- PossibleThermistor shorted inside the motor
- PossibleChafed harness between drive unit and motor control module
- 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.