P07E8 — 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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Range actuator
- Wiring harness
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Open wire to the range actuator
- Pin pushed back out of connector body
- 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
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
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.