P0A39Generator Temperature Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A39 is the high-side counterpart of P0A38: the generator temperature signal stays above the range a working sensor can deliver. Mitsubishi sets it on the 2023 Outlander PHEV when the generator W-phase coil sensor voltage reaches 4.93 V or more for at least 0.5 s. A voltage that close to the reference typically means the sensor circuit is open, a connector is unplugged or a terminal has lost contact, less often a short to a supply. Mitsubishi points to the power drive unit, the coil sensor in the generator and the harness. P0A37 handles implausible but in-range readings, P0A3B a real overheat. No other manufacturer documents P0A39 publicly. The system cannot protect the generator and limits its use.
- What you may notice
- Hybrid warning or check engine light
- Generator temperature shows a very low fixed value
- Generator output or series mode restricted
- Likely causes
- LikelyOpen sensor circuit or unplugged generator connector
- PossibleSpread or corroded terminals at the generator or power drive unit
- PossibleGenerator coil sensor open internally
- RareSignal wire shorted to a supply voltage
- 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.