P25C4: The brake booster temperature sensor A has an electrical fault
The brake booster temperature sensor A has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P25C4 |
|---|---|
| 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 P25C4 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 P25C4 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
- P25B6 The turbocharger wastegate B has got stuck
- P25BA The regeneration control switch has a broken or disconnected wire
- P25BB The regeneration control switch gives a lower signal than normal
- P25BC The regeneration control switch gives a higher signal than normal
- P25C5 The brake booster temperature sensor A gives readings outside the normal range
- P25C6 The brake booster temperature sensor A gives a lower signal than normal
- P25C7 The brake booster temperature sensor A gives a higher signal than normal
- P25C8 The brake booster temperature sensor A fails now and then
- P2563 Turbocharger boost control position sensor A range/performance
What does code P25C4 mean?
The brake booster temperature sensor A has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P25C4?
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, P25C4 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.
