Powertrain, generic (extended)

P2811 Pressure Control Solenoid G Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Loose terminal or fretting corrosion in the gearbox connector
Intermittent contact inside the valve body solenoid assembly
Coil that fails only when hot

Symptoms

  • Occasional harsh shift, then normal again
  • MIL that comes and goes

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,500
Time1–6 h

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

Parts involved

pressure control solenoid gwiring harness

Related codes

P2810P2812P2814P2807

References: static.nhtsa.gov, law.cornell.edu, gsi.ext.gm.com.