Question about 1997 Buick LeSabre

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The check engine light comes on and stays on and will also go off. It's been doing this for over a year now and mechanics can't find any thing wrong. What could really be the problem? Is there a fuse that might need to be replaced?

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There are some intermittent check engine issues and the code is not stored check your gas cap look at the o-ring does it have cracks if so the pressure in the system will cause an intermittent failure take your car to the shop when the light is on of if you have friend with a code reader grab the code

Posted on May 18, 2011

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Any time your "check engine" light comes on, it's time to take it to an ASE Certified Mechanic...I could just need a tune-up, but why take chances??? There are good Mechanics out there...Do you k now somebody, who has used one mechanic (Shop?) for a long time???

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You may need to find a different shop

Nothing showing up, is about as common
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They know you won't pay diagnostic time or believe
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Is this a problem with my Santa Fe's computer?


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Well, if a mechanic on-site can't find the problem, you probably need a technician trained on Pontiac or GM systems.
Automotive systems today are so complicated and diverse, I couldn't even hazard a guess, and I've worked on cars and trucks for over 30 years. Us shadetree mechanics have just about seen our waterloo. Sorry, Denise.

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Let me answer your last question first. Once the light is turned off, it will not come back on UNLESS the engine computer detects a problem with it's engine management. If the problem you are having is still alerting the computer, or if any problem is detected, the computer will turn on the check engine light again. The computer also stores trouble codes in it's memory for retrieval. As long as the light is on, the computer is telling you the problem is ongoing-it hasn't gone away.
Not too surprised you got three different ideas about what is wrong. That's kind of the nature of complex electronic controls diagnosing. The trouble codes don't tell a mechanic exactly what is needed to replace or fix it. they only direct you to where to start diagnosing and looking for the problem. Until a mechanic actually digs into your car and works with the codes, and uses his own logical skills, only then will he have a better idea of what is wrong. ( Why you need a trusted mechanic.)
If you want to post the codes here, somone might give you some helpful tips.
Finally, there is a way to turn the light off and erase the codes, but if problem persists, the light will come back on. Take off your battery negative cable for a minute, and then re-connect. Reset your clock and radio pre-sets, and you're good to go. Good luck.

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You don't really have a mechanic that has much knowledge

Without the vehicle to test drive & do some testing on it,
there is no way to just guess & I suspect you wouldn't
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Find the best established shop,one that has been in the same
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You have to go on a road test with these people before you
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If that isn't some they want you doing take your vehicle &
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So what test tools they have,study obd2 on internet & have some
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Some vehicles come on after they get alot of miles on them as routine maintenance may be required like a tune up new spark plugs , plug wires and distributor cap and rotor. You can unhook your battery terminal on some vehicles it will reset the light. you can try this first if the light comes back on get a tune up . or have a mechanic put it on his computer but I would do that last cause it can cost $20 -$60 depends on your mechanic.

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