markwilliam Posted November 6, 2010 Report Share Posted November 6, 2010 My 2005 Cadillac Escalade engine light is on most of the time and my in dash display tells "tighten gas cap" I already replaced the cap twice from dealer and it still tells me "tighten gas cap". Link to comment Share on other sites More sharing options...
georgesam Posted November 6, 2010 Report Share Posted November 6, 2010 You need to change sensor at gas fill up tube, as it looks that sensor is faulty and sending false reading to computer. If still problem occure better show to dealer and get proper diagnostic than blowing money in guesses. Link to comment Share on other sites More sharing options...
markwilliam Posted November 7, 2010 Author Report Share Posted November 7, 2010 Thanks George, will change the sensor and update if problem still persist. Link to comment Share on other sites More sharing options...
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