P0BD1Drive Motor Inverter Temperature Sensor C Circuit
- 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
- Which thermistor is called sensor C depends on the maker. In GM's hybrid tables it is the second sensor of the motor A inverter: the phase V sensor in the 2016 to 2019 tables, labelled temperature sensor 2 in the Volt and ELR. P0BD1 is its general circuit code for an electrical fault that is not classified as low, high or erratic. No manufacturer documents this exact code publicly; GM reports only the specific siblings P0BD2, P0BD3 and P0BD4. CARB requires hybrid sensor circuits to be monitored. Without a valid value the controller cannot protect that phase and normally limits motor torque. The sensor sits inside the inverter, so repairs often mean replacing the assembly.
- What you may notice
- Hybrid system warning or check engine lamp
- Reduced electric drive power
- Possible loss of electric drive
- Likely causes
- LikelyInternal fault of the sensor inside the power inverter module
- PossibleCorroded or loose connector at the inverter module
- RareSoftware fault in the motor control processor
- 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.