P0B0A: The gearbox oil auxiliary pump motor power supply voltage is below normal
The gearbox oil auxiliary pump motor power supply voltage is below normal. It usually comes from the battery, the alternator or a poor connection.
| Code | P0B0A |
|---|---|
| System | Engine and transmission |
| Group | P0Bxx, Hybrid and electric |
| Type | Generic: it means the same on every make |
How to read and clear P0B0A with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P0B0A with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P0B06 There is a fault in the gearbox oil auxiliary pump motor phase W current
- P0B07 The gearbox oil auxiliary pump motor phase W current is below normal
- P0B08 The gearbox oil auxiliary pump motor phase W current is above normal
- P0B09 The gearbox oil auxiliary pump motor power supply voltage has a broken or
- P0B0B The gearbox oil auxiliary pump motor power supply voltage is above normal
- P0B0C The auxiliary gearbox fluid pump has a hydraulic leak
- P0B0D The gearbox oil auxiliary pump motor control unit is not working properly
- P0B0E The high voltage battery current sensor B has an electrical fault
What does code P0B0A mean?
The gearbox oil auxiliary pump motor power supply voltage is below normal. It usually comes from the battery, the alternator or a poor connection.
How do you clear P0B0A?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P0B0A comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
