U0235Lost Communication With Front Distance Range Sensor - Single Sensor or Center
- Generic OBD-II code · Network
- How the car detects it
- U0235 means the forward long range radar, the single or centre sensor that measures the gap to traffic ahead for adaptive cruise and collision warning, has gone quiet. GM's 2025 OBD summary 25OBDG04B lets the object calculation module EOCM3 set it when any of six radar data bursts is absent for more than 0.25 s at 9-16 V, skipped in transport mode, after resets and during bus-off; adaptive cruise is then disabled and the code is Special Type C, so no MIL. GM PI PIC6606 (Cadillac Optiq 2025) reports Collision Alert or Driver Assist unavailable with a current U0235 and prescribes a BCM update plus a new long range radar after checking the wiring. Ford's 2014 list carries it without MIL. U023D/U023E are the corner sensors.
- What you may notice
- Adaptive cruise control unavailable
- Collision alert or driver assist unavailable message
- Likely causes
- LikelyRadar connector or wiring at the front end damaged (often after a collision)
- PossibleWeak 12 V supply or BCM calibration (GM PIC6606)
- PossibleLong range radar module faulty
- RareFault on the object or chassis bus shared with other modules
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.