P0BE8 code meaning
Drive Motor A Phase U Current Sensor Circuit High
Powertrain system Generic code P0Bxx codes Check engine light
What P0BE8 means
P0BE8 is the high-side counterpart of P0BE7: the phase U current sensor of the motor A inverter reports a value above its valid range. GM's tables set it above 700 A for 0.05 of 0.1 s (2016) or 0.1 of 0.15 s (2019), Type A, one trip; above 800 A, Type A, on the 2011 Volt; above 700 A, Type B, on the 2012 two-mode trucks; and above 440 A, Type B, two trips, in the BAS Plus (eAssist) table. A reading this high without matching battery current points to the sensor or its supply rather than real current; genuine excess current is covered by separate overcurrent codes such as P0C01. The inverter then uses a fallback control strategy and motor A delivers less torque.
P0BE8 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 P0BE8
- Malfunction indicator lamp and hybrid warning
- Reduced power from drive motor A
- Possible shutdown of electric drive
Common causes of P0BE8
- Most likelyFailed phase U 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 u current sensorWiring harnessHybrid control module
What each part of P0BE8 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. |
| E8 | The exact fault in that area. |
What to do next
- Note P0BE8 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 P0BE8
What does P0BE8 mean?
P0BE8 means "Drive Motor A Phase U Current Sensor Circuit High". P0BE8 is the high-side counterpart of P0BE7: the phase U 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 P0BE8?
Drive gently and only to a workshop. With P0BE8 the car can go into limp mode (reduced power) to protect itself.
Will P0BE8 fail an emissions test?
Yes, it can. P0BE8 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 P0BE8 to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P0BE8 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.