Powertrain, generic · Transmission
P072B Stuck in Reverse
Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible
Ford's DPS6 dry dual-clutch transmission moves its gears with two electrically driven shift drums whose position is read by Hall sensors: drum A shifts 1st, 3rd and 5th, drum B reverse, 2nd, 4th and 6th. Ford's 2012 summary lists 'stuck in gear' codes for each drum: the module commands the drum out of a gear, but the gear stays engaged. It gives no thresholds or MIL rating. P072B is the code for drum B: reverse cannot be disengaged. The transmission then locks out sub-gearbox B and can only use drum A (1st, 3rd, 5th), or the car is stranded. Slip in reverse is P0736.
Likely causes
Shift fork or synchronizer for this gear sticking
Shift drum B motor, Hall position sensing or driver faulty
Transmission module
On planetary automatics: clutch or brake not releasing (sticking valve)
Symptoms
- Transmission stays in one gear, no further shifts
- Limp mode, transmission warning
- Clunking or blocking when shifting
Repair estimate
DifficultyHardWorkshop job
Parts and labour€200–3,000
Time1–10 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
shift drumshift forkshift drum motortransmission control module
Related codes
References: newtonnet.co.uk, law.cornell.edu.