Question about 1996 Cadillac DeVille
The service engine soon, and the brake light comes on but everything that is supposed to be displayed does not
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Posted on Jan 02, 2017
Posted on Feb 01, 2009
I would guess there is a relation between the inop speedo and the service soon light being on. Push OFF and WARM on the climate control panel and hold down together for 5 sec to read codes.engine and transmission require speed input to set engine/trans parameters accordingly. The car car is safely performing in a back up mode until repairs are made
Posted on Apr 04, 2009
When the EVAP system triggers a service engine soon light (sometimes called a malfunction indicator lamp or MIL light) and the problem is corrected, the MIL light will turn off after 3 consecutive ignition cycles that the diagnostics run and does not fail.
Posted on Nov 11, 2010
SOURCE: My 2005 cadillac deville service
i have got this code before and it just be lose gas cap.....but have also had to replace the cap on a few of them .....the vent hole in it gets cloged....hope it helps
Posted on Nov 16, 2010
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