P0747: Pressure control solenoid stuck on
The automatic gearbox pressure control solenoid is stuck on, so shifts feel odd or very harsh. Dirt jamming the valve is a common cause.
| Code | P0747 |
|---|---|
| System | Engine and transmission |
| Group | P07xx, Transmission |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P0747 means
The pressure control solenoid sets the fluid pressure the automatic gearbox uses to clamp its internal clutches. It decides whether gear changes are smooth yet firm. The control unit sees the valve still acting when it shouldn’t, as if it had jammed in the on position.
Most common causes
- Dirty gearbox fluid holding the valve in place
- The pressure control solenoid mechanically jammed
- Control wire shorted to earth, keeping it switched on
- Dirty or worn valve body
- Transmission control unit (uncommon)
Symptoms
- Engine or gearbox warning light on
- Very harsh gear changes with a thump
- Hard clunk when selecting D or R
- Gearbox goes into limp mode
Can you drive with P0747?
With care You can drive gently to a garage, though the gearbox may drop into limp mode and lose gears. If it slips, the more you use it the more it wears.
Open the bonnetthe in-depth explanation
How to check it
Note when it happens: cold or hot, when stopping or moving off. With a scanner, see if the code returns straight after clearing it: instantly usually means electrical, later on more likely mechanical.
How to read and clear P0747 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 P0747 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
- P0743 Torque converter clutch circuit electrical fault
- P0744 Torque converter clutch circuit intermittent fault
- P0745 Gearbox pressure control solenoid fault
- P0746 Pressure control solenoid poor performance or stuck off
- P0748 Pressure control solenoid electrical fault
- P0749 The pressure control solenoid fails now and then
- P074A The gearbox cannot engage gear 2
- P074B The gearbox cannot engage gear 3
- 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 P0747 mean?
The pressure control solenoid sets the fluid pressure the automatic gearbox uses to clamp its internal clutches. It decides whether gear changes are smooth yet firm. The control unit sees the valve still acting when it shouldn’t, as if it had jammed in the on position.
Can you drive with P0747?
You can drive gently to a garage, though the gearbox may drop into limp mode and lose gears. If it slips, the more you use it the more it wears.
How do you clear P0747?
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, P0747 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.
