OBD-II code · Network
U025F Lost Communication With Electronic Brake Booster Control Module B
The vehicle bus reports loss of communication with electronic brake booster module B. Boost assist, brake-by-wire pedal feedback and regenerative-brake blending coordinated by this node may revert to a degraded mode.
Is it safe to drive with U025F?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Electronic Brake Booster Module B, Vehicle Bus Wiring
Related codes
- U025ELost Communication With Electronic Brake Booster Control Module A
- U025CLost Communication With Special Purpose Vehicle Control Module D
- U025DLost Communication With Front Controls Interface Module B
- U0260Lost Communication With Seat Control Switch Module A
- U0261Lost Communication With Seat Control Switch Module B
- U0262Lost Communication With Audio Amplifier B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.