Powertrain, generic · Transmission

P0752 Shift Solenoid A Stuck On

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

A shift solenoid is an electrically switched valve in the valve body; together the solenoid states select the gear, and the module checks the result by gear ratio, slip or a pressure switch – the pattern of wrong gears shows which solenoid hangs off or on. P0752 means solenoid A is commanded off but its clutch stays applied. GM's 6T70 flags slip of 400 rpm for 2 s five times after one trip and then runs only reverse, first and third with maximum pressure; GM's T43 a ratio of 3.83–4.23 (first instead of fourth); GM 4-speeds the pattern 1-1-4-4 after two trips; Allison its pressure switch after 2 s. Ford calls it 'functionally failed on'. A clutch that does not release can tie up the transmission.

Likely causes

Shift spool sticking in the applied position
Solenoid stuck open or leaking
Clutch not releasing (burnt or stuck)
Contaminated or wrong fluid

Symptoms

  • Wrong, often too low gear, engine revs high
  • Tie-up or jolt on shifts
  • Limp mode (GM: reverse, 1st, 3rd only)
  • Check engine light

Repair estimate

DifficultyHardWorkshop job
Parts and labour€200–3,500
Time2–12 h

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

Parts involved

shift solenoidtransmission valve bodytransmission wiringtransmission control module

Related codes

P0751P0750P0753P0974P0731P0734

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