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.
Affected components
- Shift timing solenoid a
- Transmission fluid
Common causes
- High likelihood: Aged solenoid with weakened magnetic force
- Medium likelihood: Old, contaminated transmission fluid
- Low likelihood: Sensor element aged beyond calibration window
Possible 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
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.