P0799Pressure Control Solenoid C Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- 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. P0799 is an intermittent electrical fault of valve C. No manufacturer document available to us uses it; Saab's AF40 catches short dropouts within its circuit codes (five times in 100 ms). A loose contact or chafed harness is the likely cause; harsh shifts or limp mode appear at times.
- What you may notice
- Limp mode or harsh shifts at times
- Warning lamp comes and goes
- Likely causes
- LikelyLoose contact or corroded connector
- PossibleChafed harness
- RareCoil with heat-dependent winding fault
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.