Parking Sensor Warning

1&Done

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Apr 9, 2022
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Do the parking sensors work off of a fuse or relay of some sort? My parking sensor says “check system” when slowing down to about 4 mph. The exclamation point is only in the front so I parked the car and turned on the ignition, set the emergency brake and placed the car in reverse, all four sensors detected me and beeped very loud, placed the car in drive and walked by all four sensors, nothing. I don’t want to take my car in, it’s under warranty, and even if not, I’d pay for the repair, it’s just that the dealership sucks sooooo bad. Any tips would be appreciated? Also, could I get to the sensors from underneath the car without having to take the bumper off?
 
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