P2814Pressure Control Solenoid G Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2814 reports that the drive line of solenoid G is pulled toward ground, typically a chafed wire or a coil shorted to ground. GM's 2020 tables name G as the line pressure valve on nine- and ten-speed boxes and the converter clutch valve on the eight-speed; a resistance of about 0.5 ohm to ground, present for 0.3 s out of a 0.5 s sample, sets a Type A fault. In the 2023 Corvette dual-clutch box G drives the limited-slip differential, and a pin voltage under roughly 1.7 V while switched on stores it as Type B. Ford's 2024 summary uses it for a shorted switch on the even clutch cooling valve of the TR9070. GM's PIP5799 replaces the 10-speed valve body when P2812 or P2814 has no other cause. Expect firm shifts or a fixed line pressure.
- What you may notice
- MIL or transmission warning on, often with a fault message
- Firm shifts because line pressure falls back to a fixed value
- Converter clutch no longer locks up (eight-speed applications)
- Limited-slip differential inactive on dual-clutch Corvettes
- Likely causes
- LikelySolenoid G control wire chafed through to ground in the gearbox harness
- PossibleSolenoid G coil with internal short to its housing
- PossibleFault inside the valve body assembly (GM 10-speed, PIP5799)
- RareDamaged output stage in the transmission control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €120 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.