P0758: Shift solenoid B electrical fault
The control unit sees an electrical fault on shift solenoid B in the automatic gearbox: a wire, a connector or the solenoid coil.
| Code | P0758 |
|---|---|
| System | Engine and transmission |
| Group | P07xx, Transmission |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P0758 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 measures an impossible voltage or current in the circuit of shift solenoid B, typical of a broken wire, a short or a burnt-out coil.
Most common causes
- Connector for shift solenoid B loose, corroded or with fluid inside
- Wire broken, bare or rubbing against the gearbox
- Gearbox pass-through connector (where the wiring enters) leaking or with loose pins
- Shift solenoid B with an open or shorted coil
- Fuse or power supply to the circuit
- 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 P0758?
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
With the ignition off, check the gearbox connector is fully seated, with no green corrosion or fluid inside. If the code comes back straight after clearing, a broken wire or the solenoid coil is the likely culprit.
How to read and clear P0758 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 P0758 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
- P0754 The gearbox solenoid A fails now and then
- P0755 Shift solenoid B fault
- P0756 Shift solenoid B poor performance or stuck off
- P0757 Shift solenoid B stuck on
- P0759 The gearbox solenoid B fails now and then
- P075A The gearbox solenoid G is not working properly
- P075B Gearbox shift solenoid G performs poorly or is stuck off
- P075C The gearbox solenoid G has got stuck
- 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 P0758 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 measures an impossible voltage or current in the circuit of shift solenoid B, typical of a broken wire, a short or a burnt-out coil.
Can you drive with P0758?
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 P0758?
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, P0758 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.
