P2643: The torque management feedback signal B gives a lower signal than normal
The torque management feedback signal B gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
| Code | P2643 |
|---|---|
| System | Engine and transmission |
| Group | P26xx, Auxiliary outputs and cooling |
| Type | Generic: it means the same on every make |
How to read and clear P2643 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 P2643 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
- P263F The glow plug 2 control unit is getting too hot
- P2640 The torque management feedback signal A gives a higher signal than normal
- P2641 There is a fault in the torque management feedback signal B
- P2642 The torque management feedback signal B gives readings outside the normal range
- P2644 The torque management feedback signal B gives a higher signal than normal
- P2645 Rocker arm actuator A on bank 1 has an open circuit
- P2646 Rocker arm actuator A on bank 1 performs poorly or remains off
- P2647 The rocker arm actuator A system on bank 1 stays switched on
What does code P2643 mean?
The torque management feedback signal B gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
How do you clear P2643?
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, P2643 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.
