P0A3BGenerator A Over Temperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A3B reports that the hybrid generator itself has become too hot, with the temperature sensor working correctly. Mitsubishi documents it as generator coil temperature high on the 2023 Outlander PHEV: the monitor runs continuously and sets the code when the W-phase coil temperature criterion of 199 °C is met for one second. Mitsubishi's checks cover higher-priority codes, the radiator fan, and the EV oil cooling circuit that cools the generator; if those are fine, the generator is replaced. P0A37 to P0A39 are the sensor faults that must be ruled out first, P0A3E the over-temperature of the generator inverter. No other manufacturer documents P0A3B publicly. The system restricts generator output, which can cut charging and series-mode power.
- What you may notice
- Hybrid system warning or overheat message
- Reduced charging and power when the engine drives the generator
- Battery state of charge drops during driving
- Likely causes
- LikelyFault in the oil cooling circuit of the generator (low oil, leak, pump)
- PossibleRadiator fan not working
- PossibleInternal generator fault such as damaged winding insulation
- RarePower drive unit commanding excessive generator current
- 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: €150 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.