P0BFC code meaning
Drive Motor B Phase W Current Sensor Circuit High
Powertrain system Generic code P0Bxx codes Check engine light
What P0BFC means
P0BFC is the signal-high fault of the phase W current sensor in the motor B inverter. GM sets it above 800 A on the 2011 Volt (Type A, one trip), above 700 A on the 2012 and 2013 two-mode trucks (Type B, two trips, 10 of 15 samples) and above 700 A for 0.05 of 0.1 s in the 2016 tables or 0.1 of 0.15 s in a 2019 table (Type A). A reading this high with no matching battery current indicates the sensor, its supply or an open reference instead of actual current; true phase overcurrent of motor B is logged as P0C04, and the plausibility of all three phases together as P0BFE. With P0BFC stored the inverter derates motor B, and the hybrid system leans more on the engine and motor A.
P0BFC at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0BFC
- Malfunction indicator lamp and hybrid warning
- Reduced power from drive motor B
- Engine runs more often because electric drive is limited
Common causes of P0BFC
- Most likelyFailed phase W current sensor in the motor B inverter
- PossibleSensor signal shorted to the sensor supply voltage or open reference ground
- Less likelyPoor contact at an internal or external inverter connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor b phase w current sensorWiring harnessHybrid control module
What each part of P0BFC means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B | Area: hybrid propulsion. |
| FC | The exact fault in that area. |
What to do next
- Note P0BFC and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0BFC
What does P0BFC mean?
P0BFC means "Drive Motor B Phase W Current Sensor Circuit High". P0BFC is the signal-high fault of the phase W current sensor in the motor B inverter. It is a generic code, so it means the same on every make.
Is it safe to drive with P0BFC?
Drive gently and only to a workshop. With P0BFC the car can go into limp mode (reduced power) to protect itself.
Will P0BFC fail an emissions test?
Yes, it can. P0BFC is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0BFC to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P0BFC clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.