Powertrain, generic · Transmission
P07FB Stuck in Gear 10
Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible
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.
Likely causes
Shift fork actuator or shift valve sticking (contamination)
System pressure low or unstable (mechatronic pressure valve)
Shift fork, synchronizer or gear damaged
Fluid or filter contaminated
Symptoms
- Transmission stays in gear 10 and will not downshift
- Weak take-off after stopping
- Transmission warning, limp mode
Repair estimate
DifficultyHardWorkshop job
Parts and labour€150–4,000
Time0–12 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
shift fork actuatortransmission mechatronicsshift forktransmission control module
Related codes
References: law.cornell.edu, static.nhtsa.gov.