Powertrain, generic (extended)

P2826 Pressure Control Solenoid J Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2826 indicates that the line to solenoid J is pulled to ground. GM's 2020 tables name three uses for J: the clutch select valve of the nine-speed, the default disable valve of the ten-speed and the boost valve of the eight-speed. About 0.5 ohm to ground for 0.3 of 0.5 s gives a Type A fault, and T87a eight-speed controllers also log P2826 when the J circuit is open, so a broken wire can hide behind it. The 2016 eight-speed table already set it after one trip with the same window. On the 2023 Corvette the park lock engaging valve is checked while energized; a pin voltage below roughly 1.7 V for 150 ms yields Type B. Ford's TR9070 assigns a shorted switch at its park lock valve to this code. Chafed insulation at brackets is a frequent cause.

Likely causes

Control wire shorted to ground through chafed insulation
Coil of valve J shorted to its housing
Open J circuit reported as low on GM T87a controllers

Symptoms

  • Limp gear or loss of boost pressure
  • Park lock fault message (dual-clutch models)
  • MIL on

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–2,500
Time1–6 h

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

Parts involved

pressure control solenoid jwiring harness

Related codes

P2827P2824P2822P281DP282F

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com.