P274B: The gearbox C oil temperature sensor gives readings outside the normal range
The gearbox C oil temperature sensor gives readings outside the normal range. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | P274B |
|---|---|
| System | Engine and transmission |
| Group | P27xx, Transmission |
| Type | Generic: it means the same on every make |
How to read and clear P274B 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 P274B with its description and whether it’s confirmed, pending or permanent.
This code is usually stored by the gearbox control unit. If the car reports it over standard OBD, you read it for nothing with FREE; to read it straight from the gearbox control unit, with its description and clearing, you need PRO.
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
- P2747 No signal comes from intermediate gearbox shaft speed sensor B
- P2748 The intermediate shaft speed sensor B fails now and then
- P2749 The intermediate shaft speed sensor C has an electrical fault
- P274A The gearbox C oil temperature sensor has an electrical fault
- P274C The gearbox C oil temperature sensor gives a lower signal than normal
- P274D The gearbox C oil temperature sensor gives a higher signal than normal
- P274E The gearbox C oil temperature sensor fails now and then
- P2750 The intermediate shaft speed sensor C gives readings outside the normal range
What does code P274B mean?
The gearbox C oil temperature 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 P274B?
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, P274B 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.
