U055FInvalid Data Received From Electronic Brake Booster Control Module A
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- An electronic brake booster replaces the vacuum servo: a travel sensor reads the pedal and an electric motor supplies the assist, as in Bosch's iBooster, which also lets the brake system blend in regenerative braking and back up the stability control unit. U055F is set when booster A transmits but its data, such as pedal travel, assist status or pressure request, fail the receiver's checks. No manufacturer documents U055F publicly. Ford fits such a booster (EBB) to the 2020-2021 Escape, Bronco Sport, Explorer, Corsair and Aviator; an interrupted supply to the EBB there left a network code in the ABS module and lit the ABS and stability lamps. Lost communication is U025E. Expect warning lamps and possibly reduced assist.
- What you may notice
- ABS, brake or stability warning lamps on
- Harder pedal or changed pedal feel
- Regenerative braking or driver assistance functions limited
- Likely causes
- LikelyBooster control unit or its pedal travel sensor faulty
- PossibleSupply interrupted or weak battery during start or service work
- PossibleBooster and ABS/ESC software not matched
- RareBus wiring or connector at the booster damaged
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.