U02B5Lost Communication With Front Radar Module B
- Generic OBD-II code · Network
- How the car detects it
- U02B5 is set when front radar B stops answering on the network. It is one of the few codes in this group with a public manufacturer case: on the 2022 Jeep Grand Wagoneer, Stellantis STAR case S2208000105 reports Active Driving Assist as not ready while the central ADAS module (CADM) holds U02B5, because connector D1082A of the front long-range radar (LRRF), mounted behind the bumper, was not fully latched; reseating and locking it cured the fault. At Stellantis, B therefore points to the long-range radar. Mercedes-Benz gives letter B to the right-hand outer radar at the front of the 2026 CLA electric, seen in its invalid-data partner U05B655. Adaptive cruise and the driving assistant stay off until the link returns; the engine is unaffected.
- What you may notice
- Driving assistant reported as not ready
- Adaptive cruise and forward collision warning off
- Likely causes
- LikelyRadar connector not fully latched (Stellantis LRRF connector D1082A)
- PossibleWiring or radar damaged by a front impact or bumper work
- RareRadar module B failed
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.