P0750: Shift Solenoid "A"
The transmission control unit has detected a fault with shift solenoid A or its circuit.
Normal risk
Usually drivable, but shifting may be wrong or the gearbox may stay in one gear. Have it checked soon.
Short answer · Can I keep driving with P0750?
Usually yes, at moderate speed. The gearbox may skip gears, shift harshly or hold a fixed gear. Have it checked soon.
What does P0750 mean?
P0750 means the transmission control unit sees an electrical or performance fault with shift solenoid A, one of the valves that switch hydraulic pressure to change gear. A failed solenoid, a wiring or connector fault, low or dirty fluid or a valve body problem are typical causes. Which gears are affected depends on the transmission design.
What the car does when the code is set
The check engine light comes on. Depending on the transmission fault, shifting may be normal, harsh or delayed, or the transmission may stay in one gear (limp mode).
How the system works
An automatic transmission has its own control unit that reads speed sensors, the selector position and pressure sensors, and controls shifting through solenoids. When it detects a fault that can affect emissions, it asks the engine control unit to light the check engine lamp. Because the engine control unit stores a code for that request, a basic scanner often shows only this code, while the detailed code stays in the transmission control unit.
Common symptoms
Possible causes
Listed without ranking. The cause on your car depends on make, engine and mileage — see the maker notes below.
- Fault in the transmission control systemThis code only reports that the transmission control unit has stored its own fault.
- Low or old transmission fluidOften found together with shifting codes.
- Sensor or solenoid faultSpeed sensors, pressure solenoids and wiring.
- Communication problemBetween the engine and transmission control units.
How it is diagnosed
- Read the transmission control unitUse a scan tool that reads the transmission module: the real cause is stored there.
- Check the fluidCheck level and condition as the service data describes.
- Follow the specific codeDiagnose the code from the transmission module.
- Clear and test-driveClear codes from both modules and test-drive.
Questions about P0750
Can a fluid change fix P0750?
If dirty fluid made the solenoid stick, fresh fluid and a filter can help. An electrical fault in the solenoid or wiring needs repair. The solenoid is often accessible after removing the transmission pan.
Why does my basic scanner only show this code?
Many simple scanners read only the engine control unit. A scanner that reads the transmission module shows the real fault code.
Is P0700 a transmission failure?
Not necessarily. It only reports that the transmission control unit stored a fault. The real code there shows what is wrong.