U025F: Lost Communication With Electronic Brake Booster Control Module B
Standardized SAE J2012 code · U02xx — Lost communication with modules
What does U025F mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
Common causes
- High Bus wiring open or shorted
- Medium Module without power or ground
- Medium Module failed
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of U025F on the same make and model first.
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