P2808Pressure Control Solenoid G Performance/Stuck Off
- 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
- P2808 means valve G does not deliver the pressure or effect it is commanded to give. GM documents two very different applications. In the 2016 eight-speed table G is the converter clutch valve: with at least 750 kPa commanded, slip of 130 rpm or more in lock mode for 4 s, counted three times, sets the code, and the MIL needs two trips. In the 2023 table for the Corvette dual-clutch gearbox, G is the proportional valve of the electronic limited-slip differential; after a fault triggers a recovery routine, failed current profile checks show the valve hydraulically stuck off, logged as Type B. For the driver this means converter slip and higher fuel use, or a differential that no longer locks. The opposite fault is P2809.
- What you may notice
- MIL on, engine speed higher than expected at cruise
- Higher fuel consumption and transmission heat
- Limited-slip function inactive on Corvette
- Likely causes
- LikelyValve G stuck by contamination so pressure stays low
- PossibleWorn converter clutch lining that slips despite pressure
- PossibleLow fluid level or internal leak in the circuit
- 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.