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Q: parking assist monitors stopped working on 2004 Mercury Monterey

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My parking assist monitors have stopped working. When ignition is turned on on-off switch shows off. Can turn on and indicator light on switch shows on. When approaching object warning will sound momentarily and then system will shut itself off and indicator light on switch shows off and can not turn system back on until ignition has been turned off and then switch will turn system on but repeats problem when nearing an object. Has anyone got the answer to this problem?
(1) Answer
99% of the problems I have seen are due to a broken sensor in the bumper. When the system spots a sensor issue, it typically shuts the system down.
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