1994 Cadillac Deville High and low idle

1994 CADILLAC DEVILLE
214,000 MILES • V8 • FWD • AUTOMATIC
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JJOHNSTON2
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  • 6 POSTS
When i start the car IAC is clicking along with the pedal. Does it need to be replaced? Ran a diagnostic and code PO55 came up, what does this mean?
Apr 30, 2010 at 10:49 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Hi jjohnston2, Welcome to 2carpros and TY for the donation

P055 Closed Throttle Angle Out of Range

Try cleaning out the idle air control valve and also test the throttle position sensor-
Apr 30, 2010 at 1:59 PM
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