i'm having an issuewith my PDC on my 2007 gtc. My PDC light is blinking and it makes a long beep whenever I get down to a low speed. The sensors don't work at all when I try to park.


the only thing I did to the car was swap out the wheels for a new set of winter wheels and this started to happen. Prior to this the PDC worked fine


any idea whats going on with it?

 

A flashing PDC light indicates a fault with the system. Could be that one of the sensors got bumped during the wheel swap and damaged the sensor or knocked the connector loose, or it could simply be coincidence that something failed.
Unfortunately, with 6 sensors in the front bumper and 4 in the rear (total of 10), you will need a scan tool to see which sensor is faulty (or if its a different part of the system).