Question about 1986 Cadillac DeVille

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Service soon light came on on my 86 cadillac deville so i was wondering is that the same thing as a check engine light or different?

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That means oil plugs a tune up check engine means a problems

Posted on May 24, 2009

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"service soon" is a reminder that it needs regular maintenance, and usually the dealer has a tool to reset that light on the dashboard, which can be expensive to buy.

If you do all the maint yourself, and you know that all the fluids have been replaced or capped off, you could cover the light with a piece of black electrical tape, then go on with your life.

Posted on May 24, 2009

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Check engine light flashing check engine soon smell of gas and not running smouth


Check engine light flashing means there is a bad misfire , it flashes to tell you your damaging your catalytic converter . You need to have it check , you don't won't to have to replace the catalytic converter . Can cost up to $1,000.00 . Flashing Check Engine Light CarMD

Feb 03, 2016 | 2004 Cadillac Deville

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Service engine soon


Just from having a 97 Cadillac Deville i would lean towards o2 censor or head gasket but, there can be many different reasons, the fuel tank lid could not me sealing right, you could have different wheels & tires size, which could also cause that, after market stereos can be a common reason as well ( 97 Cadillac stock stereo was linked with the vehicles computer so removing it was like taking away a vital part of the vehicle) Quickest way to tell is take it & have it Diagnosed.

May 14, 2014 | 1995 Cadillac DeVille

1 Answer

My 1987 cadillac deville service soon light has come on a few times in the last week, doesn,t stay on...and now today my service now light (which is located right above the service soon light) came on for...


Not sure if you got an answer, however first thing you should have done was take it to AutoZone or someone with "diagnostic" computer module they can hook it up and tell you quickly. I know that my "soon" did the same thing and then "NOW" thinking it would go away like the fore mentioned "soon" and my TIMING chain busted. One thing you aren't told about when maintaining a fancy elite Cadillac or any other luxury car. The "maintenance" changes drastically. I had no idea that the timing chain needed adjusting every 60,000 miles. I had purchased my Cadi third hand and 105,000 miles. So at 140,000 miles it was way past due. Unfortunately, to replace the chain they had to remove the front of the engine. A $60 part cost $1300 to fix, but I did and she still IS the cat's meow.Point being, even though it was the early stages of computers/there is a diagnostic panel under the ashtray that can be used to trace these unforeseen problems.Hope your Cadillac is still going strong.

Jul 15, 2011 | 1987 Cadillac DeVille

1 Answer

My 98 cadillac deville will not start about one time out of 25 - I will crank it for about 10-12 seconds and after about 4 attempts, it will start. I just had the car in the garage to have this problem...


You have a "Service engine soon" light on?? possible faulty IAC valve or ignition components: cam or crank sensor intermittent failure. Typically these engines experience crank sensor failure which may cause random hard starts, stalling, poor fuel mileage. Note that not all issues will happen if these components fail!! Also cam or crank failure may or may not activate the "service engine soon" indicator.

Dec 11, 2010 | 1998 Cadillac DeVille

1 Answer

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.

May 25, 2009 | 1999 Cadillac DeVille

1 Answer

Whath does "service engine soonmeans"


SERVICE ENGINE SOON and SERVICE ENGINE NOW are 2 amber warning lights pertaining to the vehicles computers.SERVICE SOON advises you of a problem, although not an emergency should be attended to promptly. Your technician can trace the problem by accessing fault codes through the climate control panel. SERVICE NOW indicates a more severe problem which will most likely precipitate a failure / breakdown. The CHANGE OIL LIGHT indicates by time and mileage is a separate light.

Mar 20, 2009 | 2000 Cadillac DeVille

1 Answer

SERVICE ENGINE SOON


You can't tell what the problem is just by the presence of the "check engine light." Many sensors can set off the light. You can connect a diagnostic analyzer to the vehicle and it will spit out codes that you can look up to see what the problem is. That is what most shops do, or you can buy an analyzer and do it yourself. It may be harder to find one for a 1987 car though

Mar 04, 2009 | 1987 Cadillac DeVille

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