What it means
Shift solenoid A appears stuck on. The code does not identify the cause or which gears the solenoid controls.
At a glance
- Usually lights the check-engine light
How it works
Shift solenoid A is a valve that directs transmission fluid to control shifts. P0752 sets when the transmission response indicates solenoid A is stuck on or continuing to apply when it should change state; it does not identify which gears solenoid A controls.
Common causes
Most likely first.
- Solenoid stuck open
- Carbon or debris buildup preventing free movement
- Component wear with age - mechanical play
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
How to diagnose it
- Read transmission codes and freeze-frame data to determine when the unexpected solenoid A behavior occurred and whether it coincided with a specific shift.
- Check fluid level and condition using the vehicle’s specified procedure, looking for contamination that could keep solenoid A from moving freely.
- Inspect solenoid A’s connector and wiring for shorts, damaged insulation, corrosion, or fluid intrusion that could keep it energized.
- Use a scan tool to compare solenoid A commands with the observed gear and shift response, checking whether the transmission behaves as if the valve remains on.
- Test the solenoid and inspect its valve-body passage for sticking or debris using the manufacturer’s diagnostic procedure.
Common fixes
- Correct transmission fluid level and repair any leak.
- Repair a shorted wire or connector fault that keeps solenoid A energized.
- Service contaminated fluid when appropriate to the vehicle’s maintenance procedure.
- Replace solenoid A if it is confirmed stuck on or fails testing.
- Clean or repair the valve body if debris or a sticking passage is confirmed.
Can I keep driving?
Limit driving if shifts are harsh or the transmission stays in the wrong gear, and avoid high speeds, heavy loads, and towing. Continued incorrect engagement can cause overheating or internal damage; stop if the vehicle slips or loses drive.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.