What P0750 means
A shift solenoid is an electrically switched valve in the valve body.
How the engine computer detects it
Manufacturers use these codes differently: Ford reports an open circuit with the base code and shorts separately, newer GM units have separate low/high codes, and the letter is not tied to a valve number (Saab's 9-5: A = valve S2). P0750 is the general code for solenoid A and is used in practice for an open circuit: Ford's step automatics (2012–2023) set it when the smart driver feedback disagrees with the command for 0.5–5 s, with shorts to ground and power as P0973/P0974; Ram's 6.7 L with Aisin transmission calls it 'control circuit open', and a 2023 bulletin traces it to a leaking capacitor in the engine module. GM does not use P0750. With the solenoid unpowered the transmission falls back to a hydraulic default gear with maximum pressure.
Written from public technical sources and not yet checked by a mechanic. How we write these pages
Symptoms
- Check engine or transmission warning lamp
- Limp mode in a fixed gear, no upshifts
- Harsh shifts from maximum line pressure
Common causes
- Open or corroded wire or transmission pass-through connector Most likely
- Solenoid coil open or shorted Possible
- Internal harness or electronic module in the transmission Possible
- Module driver faulty or valve supply missing Less likely
How to diagnose P0750
- Read every stored code with an OBD-II scanner. If misfire or fuel trim codes are there too, fix those first: they often cause this one.
- Inspect the parts involved: shift solenoid, transmission valve body, transmission wiring, transmission control module.
- Work through the causes above from most to least likely, cheapest checks first.
- Clear the code and drive a full drive cycle to confirm the repair held.
Vehicles that report P0750 most
| Vehicle | Years | Reports | Share | Median miles |
|---|---|---|---|---|
| Toyota RAV4 | 2001–2003 | 8 | 115k |
Counts of owner complaints to the NHTSA that mention P0750 (14 in total), not failure rates: popular models get more complaints simply because more of them are on the road. Models with fewer than 3 complaints are left out.
Reading the code
- P
- Powertrain
- 0
- Generic (SAE) code
- 7
- Transmission
- 50
- Specific fault
Questions drivers ask
Can I drive with code P0750?
If the car shifts normally, drive gently to a shop. If it's stuck in one gear, slips, shifts harshly or won't move out of Park, don't drive it: have it towed.
Will my car pass an emissions inspection with P0750?
Probably not in states that test vehicles with an OBD-II scan: an emissions-related code that keeps the check engine light on is usually an automatic fail. Rules differ by state and county, so check yours.
Often reported together
Codes that owners mention in the same NHTSA complaints as P0750. They can point to a shared cause, so it's worth checking them together.
- P0755Shift Solenoid B7 complaints
- P0753Shift Solenoid A Electrical4 complaints
- P0758Shift Solenoid B Electrical4 complaints
- P0760Shift Solenoid C3 complaints
- P1760Manufacturer-specific code3 complaints
This page is general information, not a substitute for a professional diagnosis. Repair costs are rough estimates for parts and labor and vary by vehicle and region.