P0A37Generator Temperature Sensor Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0A37 tests whether the generator temperature reading is believable. Mitsubishi documents it for the 2023 Outlander PHEV: once per drive cycle, after at least 5,400 s of soak and with the inverter switched off, the generator W-phase coil temperature is compared with the front motor coil and with the oil temperature. A gap of 26 °C to the motor or 22 °C to the oil, held for 0.8 s, sets the code. Suspects are the power drive unit, the coil sensor inside the generator and the wiring. P0A38 and P0A39 are hard voltage faults of the same sensor, P0A3B the real over-temperature. Mitsubishi is the only manufacturer found that documents P0A37 publicly. The driver sees a warning and generator use may be limited.
- What you may notice
- Hybrid warning after the first start of the day
- Generator temperature differs from oil temperature after a long rest
- Generator operation possibly restricted
- Likely causes
- LikelyGenerator coil sensor reading out of tolerance
- PossibleCorroded connector or damaged harness in the sensor circuit
- PossibleFault in the power drive unit that evaluates the sensor
- RareComparison sensor (motor coil or oil temperature) reads wrong
- 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 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.