P07B9: The gearbox parking position sensor B gives a lower signal than normal
The gearbox parking position sensor B gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | P07B9 |
|---|---|
| System | Engine and transmission |
| Group | P07xx, Transmission |
| Type | Generic: it means the same on every make |
How to read and clear P07B9 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 P07B9 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
- P07B5 The circuit of gearbox park sensor or switch A gives a low signal or performs
- P07B6 Gearbox park position sensor A gives a higher signal than normal
- P07B7 The gearbox parking position sensor A fails now and then
- P07B8 The gearbox parking position sensor B has a broken or disconnected wire
- P07BA The gearbox parking position sensor B gives a higher signal than normal
- P07BB The circuit of gearbox park sensor or switch B gives a low signal or performs
- P07BC Gearbox park position sensor B gives a higher signal than normal
- P07BD The gearbox parking position sensor B fails now and then
- 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 P07B9 mean?
The gearbox parking position sensor B gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
How do you clear P07B9?
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, P07B9 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.
