P0BD3Drive Motor Inverter Temperature Sensor C 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
- P0BD3 means the signal of inverter temperature sensor C, the phase V sensor of GM's motor A inverter, is below its valid range. GM uses an NTC thermistor with a pull-up on the sensing board, so a short to ground reads as an impossibly hot inverter. GM's thresholds: above 170 °C for 2.5 of 3.5 s, Type B, two trips, on the 2016 Volt and in a 2018 table; above 159 °C for 6.25 of 8.75 s, Type A, in a 2019 table; above 130 °C, Type A, on the 2011 Volt and 2016 ELR; above 125 °C, two trips, in the 2012 and 2013 tables. A genuine overheat of that phase is reported as P0C12. Since the sensor is part of the inverter, the usual fix is the inverter assembly.
- What you may notice
- Malfunction indicator lamp and hybrid warning
- Drive motor power strongly limited
- Reduced regeneration
- Likely causes
- LikelyShorted sensor or circuit inside the power inverter module
- PossibleSensor signal 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.