Powertrain, generic (extended)

P2817 Pressure Control Solenoid H Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2817 means valve H fails to produce the effect it is commanded to give. On GM nine- and ten-speed automatics H is the converter clutch valve: too much slip in lock mode (130 rpm) or a large slip error in controlled mode, counted three times, sets a Type A fault. GM's PIP6005 traces the code on 2024-2025 Enclave, Traverse and Acadia with the 8T65 to a seal on the turbine shaft that was harmed when the converter went in; torque converter and seal are replaced. Honda calls H the O/P shift solenoid of its CVT: bulletin 19-047 covers 2016-2018 Civic 1.5 L, 2017-2018 CR-V and some 2018-2019 Accord, where the module misread drive pulley pressure as too high, and new software fixes it. The flashing D lamp, converter slip or poor fuel economy follow. P2818 is the reverse fault.

Likely causes

Valve H stuck or hydraulically unable to apply
Damaged turbine shaft seal letting converter clutch pressure escape (GM 8T65)
Misjudged pressure signal in older control software (Honda CVT)
Low or degraded transmission fluid

Symptoms

  • MIL on or flashing D indicator
  • Converter clutch slips, engine speed higher than usual at cruise
  • Increased fuel consumption

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
Time0–10 h

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

Parts involved

pressure control solenoid hvalve body

Related codes

P2818P2816P2808P0741P281B

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