P071B: The gearbox mode switch A gives a lower signal than normal
The gearbox mode switch A gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
| Code | P071B |
|---|---|
| System | Engine and transmission |
| Group | P07xx, Transmission |
| Type | Generic: it means the same on every make |
How to read and clear P071B 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 P071B 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
- P0717 Input/turbine speed sensor: no signal
- P0718 The gearbox turbine shaft speed sensor circuit fails intermittently
- P0719 The brake switch B circuit has a low signal
- P071A The gearbox mode switch A has an electrical fault
- P071C The gearbox mode switch A gives a higher signal than normal
- P071D The gearbox mode switch B has an electrical fault
- P071E The gearbox mode switch B gives a lower signal than normal
- P071F The gearbox mode switch B gives a higher signal than normal
- P0700 Transmission control system: fault detected
- P0701 Transmission control system: range/performance
- P0702 Transmission control system: electrical fault
- P0703 Torque converter/brake switch B: circuit fault
What does code P071B mean?
The gearbox mode switch A gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
How do you clear P071B?
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, P071B 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.
