P2551: The torque management request input signal B gives a higher signal than normal
The torque management request input signal B gives a higher signal than normal. It is usually the part, its wiring or a connector with poor contact.
| Code | P2551 |
|---|---|
| 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 P2551 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 P2551 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
- P254D The power take-off 1 speed selector sensor gives a higher signal than normal
- P254E The power take-off 1 speed selector sensor fails now and then
- P254F The engine bonnet switch has an electrical fault
- P2550 The torque management request input signal B gives a lower signal than normal
- P2552 The circuit that inhibits the throttle or fuel is faulty
- P2553 The throttle or fuel inhibit system operates outside its expected range
- P2554 The circuit that inhibits throttle opening or fuel supply has a low signal
- P2555 The circuit that inhibits throttle opening or fuel supply has a high signal
- P2563 Turbocharger boost control position sensor A range/performance
What does code P2551 mean?
The torque management request input signal B gives a higher signal than normal. It is usually the part, its wiring or a connector with poor contact.
How do you clear P2551?
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, P2551 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.
