Powertrain, generic (extended)

P2814 Pressure Control Solenoid G Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Solenoid G control wire chafed through to ground in the gearbox harness
Solenoid G coil with internal short to its housing
Fault inside the valve body assembly (GM 10-speed, PIP5799)
Damaged output stage in the transmission control module

Symptoms

  • 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

Repair estimate

DifficultyHardWorkshop job
Parts and labour€120–2,500
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

P2815P2812P2810P2807P281D

References: gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com, static.nhtsa.gov.