P07F8Stuck in Gear 9
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P07F8 means gear 9 cannot be disengaged: the transmission stays in 9th despite the command to leave it. No manufacturer document available to us uses it. The family is documented only for 8th gear on eight-speed dual-clutch gearboxes (Maserati MC20: P07D7 and P07D8; Corvette 2020–23: P07D8), where hydraulic actuators move shift forks under position monitoring. Nine- and ten-speed planetary automatics from Ford, GM and Nissan report faults in 9th gear as a ratio code (P07F6) or through solenoid and clutch valve codes. The description follows the J2012 scheme and CARB's functional check of transmission outputs.
- What you may notice
- Transmission stays in gear 9 and will not downshift
- Weak take-off after stopping
- Transmission warning, limp mode
- Likely causes
- LikelyShift fork actuator or shift valve sticking (contamination)
- PossibleSystem pressure low or unstable (mechatronic pressure valve)
- PossibleShift fork, synchronizer or gear damaged
- RareFluid or filter contaminated
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.