P2811Pressure Control Solenoid G Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With P2811 the module records that valve G misbehaved only for moments, electrically or in effect, and then recovered. No maker publishes a description of this exact code. GM's preliminary information PIP5799 for 2019-2021 vehicles with 10L60 to 10L1000 automatics shows where such faults usually hide: G there is solenoid valve 7, the line pressure valve, and electrical faults on it (P2812 or P2814) are cured by a new valve body if normal diagnosis finds nothing. Because the line pressure valve affects every gear, even short dropouts can cause a single harsh shift. CARB 13 CCR 1968.2 requires the actuator to be monitored. Freeze-frame temperature data and a wiggle test of the gearbox harness help more than one static measurement.
- What you may notice
- Occasional harsh shift, then normal again
- MIL that comes and goes
- Likely causes
- LikelyLoose terminal or fretting corrosion in the gearbox connector
- PossibleIntermittent contact inside the valve body solenoid assembly
- RareCoil that fails only when hot
- 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.