Powertrain, generic (extended)

P2829 Pressure Control Solenoid K Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2829 means valve K remains hydraulically inactive although it is commanded on. In GM's 2023 Corvette dual-clutch transmission K is the selector pilot valve, which steers the selector spool of the shift-rod hydraulics. The check runs inside a synchronizer integrity routine that starts after a gear or component fault: the TCM orders small rod movements and measures them. If the rods respond as though the selector were off (no more than 100 µm of intended travel, over 100 µm on the complementary rod) and the valve's current profile check fails three times, with cooler-out oil at 40 °C or warmer, the Type A code is stored. Ford handles the same selector pilot valve of its TR9070 under P27D9 rather than a K code. Gear selection on one shaft may be lost.

Likely causes

Selector pilot valve stuck in the off position
Abrasion particles in the transmission fluid
Selector spool itself stuck (same symptom, different part)

Symptoms

  • Some gears unavailable
  • Hesitation or failed gear preselection
  • MIL on

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–6,000
Time2–12 h

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

Parts involved

pressure control solenoid kvalve body

Related codes

P282AP2828P282DP27D9P2820

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