Transmission Range Control A Circuit/Open
The transmission range control A circuit (used in shift-by-wire to drive the shift actuator that physically positions the manual valve in the valve body) is open. The TCM cannot move the manual valve into the commanded range, blocking shifts between P/R/N/D.
Affected components
- Range actuator
- Wiring harness
Common causes
- High likelihood: Open wire to the range actuator
- Low likelihood: Pin pushed back out of connector body
- Low likelihood: Cracked solder joint inside the module or sensor
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.