P055A: The engine oil pressure sensor B has an electrical fault
The engine oil pressure sensor B has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P055A |
|---|---|
| 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 P055A 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 P055A 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
- P0556 The brake booster pressure sensor gives readings outside the normal range
- P0557 The brake booster pressure sensor gives a lower signal than normal
- P0558 The brake booster pressure sensor gives a higher signal than normal
- P0559 The brake booster pressure sensor fails now and then
- P055B The engine oil pressure sensor B gives readings outside the normal range
- P055C The engine oil pressure sensor B gives a lower signal than normal
- P055D The engine oil pressure sensor B gives a higher signal than normal
- P055E There is a fault in the lambda sensor control unit system voltage
- 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 P055A mean?
The engine oil pressure sensor B has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P055A?
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, P055A 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.
