P07D7 — Stuck in Gear 8
The transmission has entered 8th gear but cannot leave it on command — typically a stuck shift solenoid or a stuck-on friction element holding the 8th-gear pattern locked. The TCM forces limp-home mode if upshift/downshift attempts fail repeatedly.
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
- Shift solenoid
- Clutch pack
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Stuck shift solenoid
- Stuck-on friction element
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
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.