P07F8 code meaning
Stuck in Gear 9
Powertrain system Generic code P07xx codes Check engine light
What P07F8 means
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.
P07F8 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 12 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P07F8
- Transmission stays in gear 9 and will not downshift
- Weak take-off after stopping
- Transmission warning, limp mode
Common causes of P07F8
- Most likelyShift fork actuator or shift valve sticking (contamination)
- PossibleSystem pressure low or unstable (mechatronic pressure valve)
- PossibleShift fork, synchronizer or gear damaged
- Less likelyFluid or filter contaminated
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift fork actuatorTransmission mechatronicsShift forkTransmission control module
What each part of P07F8 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| F8 | The exact fault in that area. |
What to do next
- Note P07F8 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P07F8
What does P07F8 mean?
P07F8 means "Stuck in Gear 9". P07F8 means gear 9 cannot be disengaged: the transmission stays in 9th despite the command to leave it. It is a generic code, so it means the same on every make.
Is it safe to drive with P07F8?
Drive gently and only to a workshop. With P07F8 the car can go into limp mode (reduced power) to protect itself.
Will P07F8 fail an emissions test?
P07F8 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P07F8 to fix?
Difficulty: hard. A typical repair takes 0.5 to 12 hours of work. This is a job for a workshop.
Will P07F8 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.