P2809Pressure Control Solenoid G Stuck On
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2809 is the reverse case: valve G keeps acting although it should have released. On GM's 2016 eight-speed automatics, where G operates the converter lockup clutch, the converter shows almost no slip, between minus 50 and plus 30 rpm, while the clutch is commanded off; after 1.5 s and six fail counts the controller stores the code, with the MIL lit in the first trip. GM's 2023 Corvette dual-clutch table uses the same code when the differential lock valve stays hydraulically engaged, found during a recovery routine and logged as Type B. A converter clutch that does not release can stall the engine when stopping or make the car shudder at low speed. Contaminated fluid and a sticking valve are the leading suspects.
- What you may notice
- Engine stalls or shudders when coming to a stop
- MIL on
- Differential stays locked on Corvette, tyre scrub in tight turns
- Likely causes
- LikelyValve G held open by debris
- PossibleContaminated or degraded transmission fluid
- RareMechanical fault inside solenoid G
- 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: €250 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.