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1990 buick lesabre service engine soon is on how can i turn it off I tried disconnecting both battery terminals for several hours it didnt work

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Did you check for applicable trouble codes? Your obd1, you should be able to check some codes, yourself, if there are any. How long since a tune-up?

Posted on Dec 12, 2016

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Posted on Jan 02, 2017

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You need to have the vehicle scanned or pull the code out with a code reader,and address/fix the code.If you do not repair the problem,you can clear the code,but the service engine light will come right back on.To clear the code,you can disconnect the negative terminal on the battery for at least 20 minutes,then reconnect the battery,but the car is going to be hard to get to idle,because sometimes the computer has to relearn how to idle the engine without stalling.Good luck.

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