Powertrain, generic (extended)

P2718 Pressure Control Solenoid D Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2718 points to an open control circuit of solenoid D: the coil draws no current because a wire, pin or the winding itself is broken. GM's 2016 eight-speed table runs the open check on the clutch 4 valve and fails it after 0.3 s within a 0.5 s window (one trip); the 2017 and 2018 nine-speed tables use an impedance measurement. In 2018 GM issued service update N182193520 for 8L45 and 8L90 units in Camaro, Colorado, Corvette, Silverado and others because the valve body connector might not be fully seated, setting P2718 or P2720 and forcing limp-home. For the even-clutch shutdown valve of the 2023 Corvette dual-clutch box, it stands for open load, seen while switched off (Type A); Ford's TR9070 also files open load here.

Likely causes

Valve body solenoid connector not fully seated (GM 8L45/8L90)
Broken wire or pushed-out pin in the harness
Open winding in solenoid D
TCM output stage fault

Symptoms

  • Limp-home mode with limited forward gears
  • MIL on immediately
  • Harsh engagements

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,200
Time0.5–5 h

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

Parts involved

pressure control solenoid dwiring harness

Related codes

P2716P2719P2720P2721P2727P0960

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