P0BCEGenerator Inverter Temperature Sensor A 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
- P0BCE means the signal of generator inverter temperature sensor A is below its valid range. Inverter thermistors are usually NTC types with a pull-up resistor, as GM's tables describe for the drive motor inverter sensors: a short to ground or a shorted element pulls the voltage down, which the controller reads as an impossibly hot inverter. GM sets the comparable drive motor codes at roughly 125 to 170 °C, depending on generation. No manufacturer documents P0BCE itself publicly; CARB requires this circuit monitoring for hybrid sensor inputs. The controller then protects the generator inverter with a substitute value and limits generator power. A real overheat is reported separately as P0A3E.
- What you may notice
- Malfunction indicator lamp and hybrid warning
- Generator power strongly limited
- Battery charge drops, engine runs more
- Likely causes
- LikelyShorted sensor or circuit inside the inverter assembly
- PossibleSignal shorted to ground in external wiring, where present
- RareMoisture or coolant inside the inverter housing
- 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 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.