OBD CodesWhat it means
Solenoids are small electric valves inside an automatic gearbox. Shift solenoids route fluid to select each gear. Pressure control solenoids set how firmly the gears engage. A code may mean an electrical fault in the solenoid, or that the gear change it controls did not happen as expected.
Codes in this group
| Code | Meaning |
|---|---|
| P0745 | Pressure control solenoid A fault |
| P0746 | Pressure control solenoid A stuck off or not performing |
| P0747 | Pressure control solenoid A stuck on |
| P0748 | Pressure control solenoid A electrical fault |
| P0750 | Shift solenoid A fault |
| P0751 | Shift solenoid A stuck off or not performing |
| P0752 | Shift solenoid A stuck on |
| P0753 | Shift solenoid A electrical fault |
| P0755 | Shift solenoid B fault |
| P0756 | Shift solenoid B stuck off or not performing |
| P0757 | Shift solenoid B stuck on |
| P0758 | Shift solenoid B electrical fault |
| P0760 | Shift solenoid C fault |
| P0761 | Shift solenoid C stuck off or not performing |
| P0762 | Shift solenoid C stuck on |
| P0763 | Shift solenoid C electrical fault |
| P0765 | Shift solenoid D fault |
| P0766 | Shift solenoid D stuck off or not performing |
| P0767 | Shift solenoid D stuck on |
| P0768 | Shift solenoid D electrical fault |
| P0770 | Shift solenoid E fault |
| P0771 | Shift solenoid E stuck off or not performing |
| P0772 | Shift solenoid E stuck on |
| P0773 | Shift solenoid E electrical fault |
| P0775 | Pressure control solenoid B fault |
| P0776 | Pressure control solenoid B stuck off or not performing |
| P0777 | Pressure control solenoid B stuck on |
| P0778 | Pressure control solenoid B electrical fault |
Bank 1 is the side of the engine that has cylinder 1. Sensor 1 is before the catalytic converter and sensor 2 is after it. More terms explained.
What you may notice
- Harsh, soft or late gear changes
- A gear missing
- Gearbox stuck in second or third gear (limp mode)
- Slipping
Common causes
Most likely first:
- Dirty or low transmission fluid clogging the solenoid
- A failed solenoid coil
- A damaged internal wiring loom or connector
- Valve body wear
What to check first
- Check the fluid level and condition
- Electrical codes (the ones ending in 3 or 8) usually mean the solenoid or wiring; "stuck" codes can be dirt or wear
- Solenoids can often be replaced without removing the gearbox
Have a mechanic confirm. A fault code tells you which system reported a problem, not which part has failed. The same code can have several causes, and they differ between car models. Use this page to understand the code, then have a qualified mechanic test the car before any part is replaced.
After the repair
Once the cause is fixed, the code can be cleared with a scan tool, or the warning light goes out by itself after several trips without the fault. Clearing a code without fixing the cause only hides it for a while. More about clearing codes.
Related codes
Transmission control system request (P0700), Transmission range (gear selector) sensor (P0705), Transmission fluid temperature (P0218), Transmission input and output speed sensors (P0715), Incorrect gear ratio (P0729), Torque converter clutch (P0740), Clutch pedal position sensor (manual gearbox) (P0805). All codes.
Written in November 2026. These are generic OBD-II codes, the same on all makes. Causes and repair steps differ between models.