P2D59Generator B Over Temperature
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P2D59 indicates that generator B has become too hot. Which machine B means is up to the manufacturer: a second alternator in a dual charging system or a second motor-generator in a hybrid. No manufacturer documents P2D59 publicly. For generator A, Mitsubishi describes the hybrid case under P0A3B on the 2023 Outlander PHEV: a W-phase coil temperature of 199 °C or more for one second sets the code. On the alternator side, Infineon's LIN regulator TLE8881-3 raises a high-temperature flag as soon as the chip passes a programmable compensation threshold, where it also starts lowering the voltage set point. Typical causes are blocked cooling air or oil flow, sustained overload, a failed fan or a misreading sensor. Output is cut back, so charging or hybrid power may be limited.
- What you may notice
- Reduced charging output or charge warning
- On hybrids, limited electric or series-mode power
- Likely causes
- LikelyObstructed cooling air path or reduced oil/coolant flow to the generator
- PossibleSustained high electrical load at low engine speed
- RareTemperature sensor or regulator measuring wrongly
- Repair
- Hard · 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.