P0776Pressure Control Solenoid B Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Pressure control solenoids are current-controlled proportional valves, and what B and C mean depends on the design: on GM's clutch-to-clutch automatics they are the pressure valves of clutches 2 and 3, on GM's CVT B is primary pulley pressure and C line pressure, on Jatco CVTs B is the secondary pressure valve, on Saab's AF40 B and C are clutch valves SLC1/SLC2. P0776 means the valve is electrically fine but pressure stays too low. GM's 8-speed flags gear slip of 400 rpm for 1.5 s three times, the 9-speed clutch 2 slip over 200 rpm for 3 s, the CVT primary pressure below 200 kPa for 3 s – all after one trip. Mitsubishi's Jatco CVT flags secondary pressure 1.2 MPa off target; Nissan's bulletin calls for a mechanical CVT repair, a GM 6T70 bulletin a broken wave spring. Slipping, missing gears or lack of drive and limp mode follow.
- What you may notice
- Slipping or missing gears
- CVT: hesitation, lack of power
- Limp mode
- Check engine light
- Likely causes
- LikelyClutch, return spring or piston seal of the assigned clutch faulty
- LikelyValve body or pressure valve dirty or worn
- PossibleCVT belt or pulley damaged (CVT)
- PossibleFluid level low, fluid worn, filter clogged
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €400 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.