Powertrain, generic (extended)

P2808 Pressure Control Solenoid G Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Valve G stuck by contamination so pressure stays low
Worn converter clutch lining that slips despite pressure
Low fluid level or internal leak in the circuit

Symptoms

  • MIL on, engine speed higher than expected at cruise
  • Higher fuel consumption and transmission heat
  • Limited-slip function inactive on Corvette

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€250–4,000
Time2–10 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pressure control solenoid gvalve body

Related codes

P2809P2807P2812P0741P2817

References: gsi.ext.gm.com, gsi.ext.gm.com, law.cornell.edu.