P0755: Shift solenoid B fault
Shift solenoid B in the automatic gearbox has a fault and the box may stay stuck in one gear. Fluid, wiring or the solenoid are typical.
| Code | P0755 |
|---|---|
| System | Engine and transmission |
| Group | P07xx, Transmission |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P0755 means
Shift solenoids route fluid inside the automatic gearbox to move from one gear to the next. Exactly which job solenoid B does is up to each manufacturer. The control unit has found a fault with shift solenoid B or its circuit, without saying whether it is electrical or mechanical.
Most common causes
- Low or badly worn gearbox fluid
- Connector for shift solenoid B loose, corroded or with fluid inside
- Damaged wiring between the control unit and the gearbox
- Shift solenoid B failed or jammed with dirt
- Dirty or worn valve body
- Transmission control unit (uncommon)
Symptoms
- Engine warning light on
- Gearbox stays in one fixed gear (limp mode)
- Harsh, late or missed gear changes
- Higher fuel use from running in the wrong gear
Can you drive with P0755?
With care You can drive, but the gearbox often sticks in a single gear, so the car feels weak or over-revs. Drive calmly to a garage and avoid fast roads if it won’t change up.
Open the bonnetthe in-depth explanation
How to check it
First check the gearbox fluid level and colour if there is a dipstick, and look at the gearbox connector for looseness or fluid inside. Note which gear and what temperature the fault appears at so you can tell the garage.
How to read and clear P0755 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 P0755 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
- P0751 Shift solenoid A poor performance or stuck off
- P0752 Shift solenoid A stuck on
- P0753 Shift solenoid A electrical fault
- P0754 The gearbox solenoid A fails now and then
- P0756 Shift solenoid B poor performance or stuck off
- P0757 Shift solenoid B stuck on
- P0758 Shift solenoid B electrical fault
- P0759 The gearbox solenoid 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 P0755 mean?
Shift solenoids route fluid inside the automatic gearbox to move from one gear to the next. Exactly which job solenoid B does is up to each manufacturer. The control unit has found a fault with shift solenoid B or its circuit, without saying whether it is electrical or mechanical.
Can you drive with P0755?
You can drive, but the gearbox often sticks in a single gear, so the car feels weak or over-revs. Drive calmly to a garage and avoid fast roads if it won’t change up.
How do you clear P0755?
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, P0755 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.
