P0BCFGenerator Inverter Temperature Sensor A Circuit High
- 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
- P0BCF reports a signal from generator inverter temperature sensor A above its valid range. With the usual NTC thermistor and pull-up, an open circuit, a lost sensor ground or a cracked element drives the voltage up, which reads as an extremely cold inverter. GM's comparable drive motor checks set below -40 to -58 °C and wait until the inverter has worked for about 90 s at 20 Nm or more, so a genuinely cold start does not trigger them. No manufacturer documents P0BCF itself publicly; CARB requires circuit monitoring of hybrid sensor inputs. Until the value is valid the controller uses conservative substitutes and may limit generator power. Check the inverter connectors before replacing the unit.
- What you may notice
- Malfunction indicator lamp and hybrid warning
- Reduced generator output
- Implausibly low inverter temperature in live data
- Likely causes
- LikelyOpen sensor or circuit inside the inverter assembly
- PossibleLoose, corroded or unplugged connector at the inverter
- RareLost sensor ground
- 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 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.