P0775
Pressure Control Solenoid B
Transmission — line pressure
Generic OBD-II
High
What it means
P0775 means the transmission's pressure control solenoid B is not regulating hydraulic (line) pressure correctly. Wrong pressure causes slipping and harsh or delayed shifts and can overheat the transmission. The engine still starts, but sustained slipping can damage the internal clutches, so it is worth addressing quickly.
High
Can I keep driving? Drive as little as possible — a pressure-control fault can cause slipping and wrong line pressure that overheats and damages the transmission clutches.
Common symptoms
What you'll notice
- Check-engine light on
- Harsh, delayed, or slipping shifts
- Transmission slipping under load
- Transmission running hot
- Reduced fuel economy
Common causes
Most likely first
- Failed pressure control solenoid BLikely
- Low or contaminated transmission fluidCommon
- Wiring or connector fault in the solenoid circuitCommon
- Sticking valve bodyLess often
- Failed transmission control module (TCM) — least commonLess often
How to diagnose & fix
Work through it in order
- Check transmission fluid level and condition first — low or dirty fluid is a common cause.
- Confirm the code and read freeze-frame data.
- Inspect the solenoid wiring and connector for damage or corrosion.
- Test the solenoid resistance and operation and replace it if faulty.
- If unresolved, inspect the valve body and TCM. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0775?+
Not really — slipping from bad line pressure can overheat and damage the clutches. Minimize driving until it is fixed.
Can I just clear P0775?+
It comes back until the pressure-control fault is repaired.
Related codes
Often seen with P0775
Read & clear P0775 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX