I am not sure it the switch needs calibration. All I have found to date, is the main function of the switch is to shut off the cruise control setting if you brake......When I checked my cruise control it was working properly... If the switch is bad you don't have cruise control. While troubling shooting I found the vacuum hose from the intake manifold had a 2' split in the hoseand that was hidden where the hose goes under the intake manifold. I replace that hose and the car seemsto be back to normal (no lights). It was an original hose on a 2003. Good luck
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