Shift Timing Solenoid A
General fault on shift timing solenoid A — controls the rate at which a shift event takes place (smooth ramp vs. quick snap). The TCM detects an electrical or hydraulic anomaly that has not yet been pinned to a specific failure mode.
Affected components
- Shift timing solenoid a
- Valve body
Common causes
- High likelihood: Solenoid electrical or hydraulic fault
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.