Shift Solenoid H
General fault on shift solenoid H — used in 8/9/10-speed transmissions where multiple shift solenoids manage the larger gear matrix. The TCM detects an electrical or hydraulic anomaly without yet being able to attribute it to a specific failure mode.
Affected components
- Shift solenoid h
- 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.