Powertrain
generic / SAE
P0786
Shift Timing Solenoid A Range/Performance
Shift timing solenoid A is electrically intact, but the actual shift time does not match the model — shifts too fast (harsh) or too slow (slipping under load). Often aged solenoid with weakened force or contaminated ATF restricting the regulating port.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number7 / 86
Possible causes
- Aged solenoid with weakened magnetic force high
- Old, contaminated transmission fluid medium
- Sensor element aged beyond calibration window low
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
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 2–8 h
- Component: shift timing solenoid a
- Component: transmission fluid
- MIL / check engine light
Sources
References
sae:J2012