[Jason176]

I recently encountered an issue with the BCI system where it was indicating that "BCI warning system unavailable". I took it to the dealership to have them check it out. The system had started working properly again prior to arriving at the dealership, but the tech indicated that they pulled a code "C1B55" radar blockage right rear. They suggested that the vehicle undercoating process may have coated the radar sensors causing an issue. Does this make sense? I have had the vehicle sprayed each year with the "Corrosion Free" rust check system since it was purchased new in 2018 (currently has 30K kms on it). The tech said that he blew air inside the rear fender but would have to remove the bumper covers to clean the sensors if the issue continues. Would the rust check process have an impact on the radar sensors?

 

[Jason176]

If the tech was able to pull that specific code than yes, I would assume whatever it is you are having sprayed on the underside of the vehicle could have covered up that sensor and thrown the code. If they clear the code, clean the surface and the error comes back again you could have another problem with a sensor failure not related to the coating you had applied.

Thanks for input. The rust check spray was completed back in November but am just having an issue now. One would expect that if it were that, it would have caused issues right away. Will see if the code comes back or have any further issues.