P0BDCDrive Motor Inverter Temperature Sensor E Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0BDC checks whether inverter temperature sensor E, GM's phase W sensor in the motor A inverter, agrees with the vehicle after a long stand. The 2016 and 2018 tables compare it after a cold soak with a calculated average temperature; more than 20 °C apart for 0.525 of 0.625 s sets Type B, two trips. A 2019 table uses the same 20 °C as Type A. The 2011 Volt compares it with power electronics coolant temperature (20 °C, Type A); the 2012 and 2013 two-mode trucks use 15 °C after at least 360 minutes off (Type B). GM bulletin PIC6303A says that on 2016-18 Volt, Malibu, LaCrosse and Regal the code has no remedial action; the inverter is replaced only together with P0AC4.
- What you may notice
- Malfunction indicator lamp after two drives, often without any drivability change
- Code found during inspection without customer complaint
- Likely causes
- PossiblePhase W thermistor drifting out of tolerance
- PossibleUneven inverter cooling or residual heat after the soak period
- RareFailing power inverter module (replace only with P0AC4 per GM PIC6303A)
- 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.