P2859: The clutch A pressure disengagement gives readings outside the normal range
The clutch A pressure disengagement gives readings outside the normal range. It is usually the part, its wiring or a connector with poor contact.
| Code | P2859 |
|---|---|
| System | Engine and transmission |
| Group | P28xx, Transmission and engine |
| Type | Generic: it means the same on every make |
How to read and clear P2859 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 P2859 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
- P2855 The clutch A pressure charge gives readings outside the normal range
- P2856 The clutch B pressure charge gives readings outside the normal range
- P2857 The clutch A pressure coupling gives readings outside the normal range
- P2858 The clutch B pressure coupling gives readings outside the normal range
- P285A The clutch B pressure disengagement gives readings outside the normal range
- P285B The gearbox A fork actuator has a broken or disconnected wire
- P285C The gearbox A fork actuator gives readings outside the normal range
- P285D The gearbox A fork actuator gives a lower signal than normal
What does code P2859 mean?
The clutch A pressure disengagement gives readings outside the normal range. It is usually the part, its wiring or a connector with poor contact.
How do you clear P2859?
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, P2859 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.
