P255F: The air conditioning request A gives readings outside the normal range
The air conditioning request A gives readings outside the normal range. It is usually the part, its wiring or a connector with poor contact.
| Code | P255F |
|---|---|
| System | Engine and transmission |
| Group | P25xx, Auxiliary inputs and electrical system |
| Type | Generic: it means the same on every make |
How to read and clear P255F 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 P255F 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
- P255B The power take-off 2 speed selector sensor gives readings outside the normal
- P255C The power take-off 2 speed selector sensor gives a lower signal than normal
- P255D The power take-off 2 speed selector sensor gives a higher signal than normal
- P255E The power take-off 2 speed selector sensor fails now and then
- P2560 The engine coolant level is below normal
- P2561 The air conditioning control unit has requested the engine warning lamp to
- P2562 The turbocharger boost control position sensor A has an electrical fault
- P2563 Turbocharger boost control position sensor A range/performance
What does code P255F mean?
The air conditioning request A gives readings outside the normal range. It is usually the part, its wiring or a connector with poor contact.
How do you clear P255F?
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, P255F 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.
