P07FB code meaning
Stuck in Gear 10
Powertrain system Generic code P07xx codes Check engine light
What P07FB means
P07FB means gear 10 cannot be disengaged: the transmission stays in 10th 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, Corvette 2020–23); no dual-clutch gearbox with ten gears and these codes is known. Ten-speed planetary automatics from Ford and GM report faults in 10th gear as a ratio code (P07F7, on Ford's 10R140 with 10th gear locked out) or through valve codes. The description follows the J2012 scheme and CARB's functional check of transmission outputs.
P07FB 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 P07FB
- Transmission stays in gear 10 and will not downshift
- Weak take-off after stopping
- Transmission warning, limp mode
Common causes of P07FB
- 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 P07FB 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. |
| FB | The exact fault in that area. |
What to do next
- Note P07FB 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 P07FB
What does P07FB mean?
P07FB means "Stuck in Gear 10". P07FB means gear 10 cannot be disengaged: the transmission stays in 10th 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 P07FB?
Drive gently and only to a workshop. With P07FB the car can go into limp mode (reduced power) to protect itself.
Will P07FB fail an emissions test?
P07FB 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 P07FB to fix?
Difficulty: hard. A typical repair takes 0.5 to 12 hours of work. This is a job for a workshop.
Will P07FB clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.