P0BEC code meaning
Drive Motor A Phase V Current Sensor Circuit High
Powertrain system Generic code P0Bxx codes Check engine light
What P0BEC means
P0BEC is set when the phase V current sensor of the motor A inverter reports a value above its valid range. In GM's tables the limit is above 700 A for 0.05 of 0.1 s (2016) or 0.1 of 0.15 s (2019), Type A; above 800 A, Type A, on the 2011 Volt with PWM output disabled; and above 700 A, Type B, two trips, on the 2012 two-mode trucks. Because the check runs while the power stage is not switching or the value is far beyond any real current, it isolates a sensor or supply fault rather than an actual overcurrent. It pairs with P0BEB for the low side and P0BEA for offset. Expect reduced drive from motor A and further inverter codes in the memory.
P0BEC 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 P0BEC
- Malfunction indicator lamp and hybrid warning
- Reduced power from drive motor A
Common causes of P0BEC
- Most likelyFailed phase V current sensor inside the 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 a phase v current sensorWiring harnessHybrid control module
What each part of P0BEC 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. |
| EC | The exact fault in that area. |
What to do next
- Note P0BEC 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 P0BEC
What does P0BEC mean?
P0BEC means "Drive Motor A Phase V Current Sensor Circuit High". P0BEC is set when the phase V current sensor of the motor A inverter reports a value above its valid range. It is a generic code, so it means the same on every make.
Is it safe to drive with P0BEC?
Drive gently and only to a workshop. With P0BEC the car can go into limp mode (reduced power) to protect itself.
Will P0BEC fail an emissions test?
Yes, it can. P0BEC 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 P0BEC to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P0BEC clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.