U0233Lost Communication With Side Obstacle Detection Control Module B
- Generic OBD-II code · Network
- How the car detects it
- U0233 is stored when side obstacle detection control module B no longer reports. In the Saab 2011 list B is the right hand unit, which matches Volvo TJ 30858 (XC90, S90, 2016-2018): there the left sensor logs U023392 for the right one, and a software update is the fix. Toyota reverses the roles on the Tacoma 2016-2018 (T-SB-0063-19), where U0233 means the blind spot master is lost, listed alongside axis misalignment codes C1AC1/C1AC2. Ford TSB 24-2180 for Expedition and Navigator 2022-2024 sees U0233 and U0232 together in the IPMA with sensor blocked messages, blaming dirt build-up or corroded radar wiring. Because the two radars often talk to each other, a single cause can trigger both codes. Side warnings stop; no MIL.
- What you may notice
- Blind spot or cross traffic alert unavailable
- Sensor blocked message without any obstacle
- Likely causes
- LikelySide radar software outdated
- PossibleDirt, snow or ice build-up behind the rear bumper
- PossibleCorroded radar connector or harness
- RareSide obstacle module B faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.