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P0798: Gearbox oil pressure solenoid C has an electrical fault

Gearbox oil pressure solenoid C has an electrical fault.

Code P0798 at a glance
CodeP0798
SystemEngine and transmission
GroupP07xx, Transmission
TypeGeneric: it means the same on every make

How to read and clear P0798 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 P0798 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

What does code P0798 mean?

Gearbox oil pressure solenoid C has an electrical fault.

How do you clear P0798?

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, P0798 comes back.