P2733Pressure Control Solenoid F Stuck On
- 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
- P2733 is the reverse case of P2732: valve F keeps pressure on its clutch after the TCM has commanded it off, so the off-going element still carries torque during the shift. GM checks this on its nine-speed units by watching C6 slip while shifting. If slip stays below 50 rpm for 0.8 s during power downshifts or 0.15 s on any other shift, one failure is counted; three of them give a Type A fault in one trip (18OBDG04, 20OBDG03A). GM shares the logic with P2731, which covers the same check in first gear. Bulletin 21-NA-169 for low-mileage 9T45/50/60 units lists P2731 to P2733 together and, with clean fluid, renews the solenoid assembly together with the valve body. Drivers notice tie-up, flare or harsh shifts.
- What you may notice
- Tie-up or bind-up feel during shifts
- Harsh shifts or engine flare
- MIL on and fail-safe gear
- Likely causes
- LikelySolenoid F held open mechanically (solenoid body)
- PossibleDebris holding the regulator valve in the apply position
- RareRestricted clutch exhaust passage
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · 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.