P051B: The sump pressure sensor gives readings outside the normal range
The sump pressure sensor gives readings outside the normal range. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | P051B |
|---|---|
| System | Engine and transmission |
| Group | P05xx, Speed, idle and auxiliary inputs |
| Type | Generic: it means the same on every make |
How to read and clear P051B 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 P051B 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
- P0517 The battery temperature sensor gives a higher signal than normal
- P0518 The idle air control fails now and then
- P0519 The idle air control circuit system gives readings outside the normal range
- P051A The sump pressure sensor has an electrical fault
- P051C The sump pressure sensor gives a lower signal than normal
- P051D The sump pressure sensor gives a higher signal than normal
- P051E The sump pressure sensor fails now and then
- P051F The positive sump ventilation filter restriction is not working properly
- P0500 Vehicle speed sensor malfunction
- P0501 Vehicle speed sensor range/performance
- P0502 Vehicle speed sensor circuit low input
- P0503 Vehicle speed sensor intermittent, erratic or high
What does code P051B mean?
The sump pressure sensor gives readings outside the normal range. It is usually the sensor itself, its wiring or a real fault in what it measures.
How do you clear P051B?
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, P051B 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.
