P0BF7Drive Motor B Phase V Current Sensor 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
- P0BF7 reports that the phase V current sensor of the motor B inverter outputs a signal below its valid range. In GM's hybrid tables the converted current must fall below -800 A on the 2011 Volt (Type A, one trip), below -700 A on the 2012 and 2013 two-mode trucks (Type B, two trips, 10 of 15 samples) or below -700 A for 0.05 of 0.1 s (2016) and 0.1 of 0.15 s (2019), both Type A. Values like these are physically impossible for the motor phase, so the controller treats them as a sensor or circuit failure, for example a shorted output or a lost sensor supply. Unlike P0BF6 the sensor is not merely offset but outside its measuring range. Drive motor B then runs restricted.
- What you may notice
- Malfunction indicator lamp and hybrid warning
- Reduced power or no contribution from drive motor B
- Possible shutdown of electric drive
- Likely causes
- LikelyFailed phase V current sensor in the motor B inverter
- PossibleSensor signal or supply pulled to ground on the sensor board
- RarePoor contact at an internal or external inverter connector
- 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.