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Discussion Starter · #1 ·
Anyone seen this before. According to my dash, it says check rear collision warning and several other safety related things. Car stutters a bit from a stop, but drives ok otherwise.
Car Vehicle Plant Automotive design Personal luxury car


All this started after coming off cruise control for a freeway exit. I'm on a 2000 mile road trip, so timing couldn't be worse.

All warnings stay present after shutting off and starting again. Have not tried disconnecting battery yet. Car loaded with too much luggage and no tools to do so on my trip.
 

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Discussion Starter · #3 ·
Thanks. The 3 errors are specifically check front safety systems, check rear cross traffic safety system, and check blind spot monitoring system. The dash lights up with all that you see which is strange given the 3 specific warnings.

The warnings show immediately after cycling. They all went away except for the check engine light once after about 2 min of driving but came back after 2 more min.

I'm in a pickle because we're in the middle of a road trip and can't leave the car without significant cost due to schedule changes. :confused:
 

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Discussion Starter · #6 · (Edited)
For anyone who might have same issue, it was diagnosed as a wheel speed sensor assembly failure. Part hy58950-claf0.

Will be under warranty but cost if not under warranty was quoted at $310.49 usd. Part, labor, tax.

After driving another ~1000 miles to complete my road trip, all the errors have gone away and stayed off. My only suspicion now is that it started in Las Cruces, New Mexico, about 50 miles after visiting White Sands National Park in New Mexico. The sand is super fine and 98% gypsum and about 5 miles of our drive in the park was on roads covered with the sand. After another ~300 miles in Tucson, Arizona all the warnings went away. I can only imagine that whatever residue that was interfering with the speed sensor naturally blew off during the drive.

The dealer mentioned the wheel speed sensor is a sensitive magnetic based instrument. In a quick Google search, it seems that some gypsum based materials have an electromagnetic shielding effect. I can only surmise the sands caused the issue. Any engineers have any thoughts on this theory?
 
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