Question about 2002 Cadillac Deville

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Engine service soon light

Is there a way to stop a service light from comeing on? every thing works good on the car,but the servuce engine comes on for long periods of time.

Posted by billchurch on

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  • Anonymous Aug 27, 2008

    check engine light is on

  • Anonymous Mar 17, 2009

    My Codes on my Cadillac Deville reads P0741 and P1860 and I would like to know what these codes mean.

  • TromboneDave Mar 20, 2009

    My service engine soon light came on at 62,000 miles on our 2002 Devile. Last time I checked the air filter which was dirty and light went off after while . This time the filter is clean and it stays on . Will have to take it in to my mechanic



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Posted on Oct 21, 2008



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The service engine soon light, or malfunction indicator lamp, indicates that the car's engine management systems are finding a fault somewhere. The vehicle may be running "fine" but when a MIL indicator is on it tells your car's computer to run on a "drive in default". In other words, it senses something wrong and cannot calculate the correct setings to make the engine run as it should so it sets the fuel to air ratio and many other things to values that it knows will make it run so you can have it serviced.

You fuel economy is likely suffering and running and engine on default settings may cause engine deposits and further damage.

You could take your car to autozone and they will pull the codes for free but they may not clear it for you. There is a procedure on many Caddis that allow you to look athe the fault codes throught the welcome or convience center or through the auto climate controls display. I will research the procedure for this vehicle and post it as info becomes available.

You could also disconnect the battery for a few minutes to clear the codes BUT YOUR SECURITY SYSTEM AND OR STEREO LOCKOUT CODE MAY RENDER SOME SYSTEMS USELESS IF YOU DONOT HAVE THE CORRECT CODE TO REACTIVATE THEM. I do not recommend doing it that way.

Posted on Jun 27, 2008


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1 Answer

How do you reset the service engine soon light

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