P0BE4 code meaning
Drive Motor Inverter Temperature Sensor F Circuit Intermittent/Erratic
Powertrain system Generic code P0Bxx codes Check engine light
What P0BE4 means
P0BE4 stands for brief dropouts or jumps in the signal of inverter temperature sensor F, which GM's hybrid tables place at phase W of the motor B inverter. The reading returns to normal between events, which separates it from the steady low and high faults P0BE2 and P0BE3. GM does not list this code, and no other manufacturer documents P0BE4 publicly. CARB's monitoring requirement for hybrid sensor circuits covers such intermittent faults as well. Typical sources are a connector with poor contact, a cracked solder joint or a thermistor whose resistance has become unstable. While the signal is distrusted, the controller tends to cut motor B power, and the fault can disappear before the workshop sees it.
P0BE4 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 P0BE4
- Malfunction indicator lamp that comes and goes
- Occasional power reduction of drive motor B
Common causes of P0BE4
- Most likelyLoose, corroded or vibrating connector at the inverter
- PossibleCracked solder joint on the inverter sensing board
- Less likelyAgeing thermistor with unstable resistance
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive motor inverter temp sensor fWiring harnessHybrid control module
What each part of P0BE4 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. |
| E4 | The exact fault in that area. |
What to do next
- Note P0BE4 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 P0BE4
What does P0BE4 mean?
P0BE4 means "Drive Motor Inverter Temperature Sensor F Circuit Intermittent/Erratic". P0BE4 stands for brief dropouts or jumps in the signal of inverter temperature sensor F, which GM's hybrid tables place at phase W of the motor B inverter. It is a generic code, so it means the same on every make.
Is it safe to drive with P0BE4?
Drive gently and only to a workshop. With P0BE4 the car can go into limp mode (reduced power) to protect itself.
Will P0BE4 fail an emissions test?
Yes, it can. P0BE4 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 P0BE4 to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P0BE4 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.