1994 Cadillac Deville High and low idle

Tiny
JJOHNSTON2
  • MEMBER
  • 1994 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 214,000 MILES
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?
Friday, April 30th, 2010 AT 10:49 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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-
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Friday, April 30th, 2010 AT 1:59 PM

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