P0752Shift Solenoid A Stuck On
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Wrong, often too low gear, engine revs high
- Tie-up or jolt on shifts
- Limp mode (GM: reverse, 1st, 3rd only)
- Check engine light
- Likely causes
- LikelyShift spool sticking in the applied position
- PossibleSolenoid stuck open or leaking
- PossibleClutch not releasing (burnt or stuck)
- PossibleContaminated or wrong fluid
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €200 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.