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Anonymous Posted on Aug 30, 2017

2002 cadillac deville service engine light flashing at 20 mph

Service engine light was on, battery went dead due to dome lights left on for @ 36 hrs, battery would not take charge, replace battery, now service engine light flashes at 20 mph, with car coasting and trans in nuetral light flashes till car gets down to 20 mph then it stays lite. Have replaced coil paks, plugs, and boots, remove battery cables an drain 12v system, no change...

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Rick M

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  • Cadillac Master 4,148 Answers
  • Posted on Aug 30, 2017
Rick M
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Did you replace those parts based on the trouble code? Or are you just throwing parts at it? What are the codes?

http://ricksfreeautorepairadvice.com/flashing-check-engine-light-is-serious/

5 Related Answers

Anonymous

  • 607 Answers
  • Posted on Apr 23, 2009

SOURCE: 1999 cadillac deville brake light switch

Replace the brake light switch - sticking . Hope this helps

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honeymokey

honeymokey

  • 3113 Answers
  • Posted on May 09, 2009

SOURCE: replaced battery now car will not start, service security system message on dashboard info. please help

The car is not reading the key and thinks someone is trying to steal it. Try another key or see a dealer.

Anonymous

  • 3533 Answers
  • Posted on May 25, 2009

SOURCE: the service engine soon light stays on i just change oil

you can try taking the positive cable off for about 3-secs and check in you owner manual to see if it tell you how and if you do have one try this website www.edmunds.com to see if you can download one for you car.

Anonymous

  • 1 Answer
  • Posted on May 07, 2010

SOURCE: the service stability system light came on in my

My Service Stability System Message along with the (ABS) Brake Light lit up on my dash, what can i do to fix it...Or what does this mean ?

Anonymous

  • 1 Answer
  • Posted on Dec 29, 2010

SOURCE: service stability system light flashes

i hav the same problem wit my 98 deville wat did u do to fix it and wat was the cheapest way. Also did u have anyother problems wit ur car during the time u were driving it wit these lights on

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