Buick Ultra check engine warning light
ellis479
05-16-2009, 06:50 PM
Hello, does anyone know the procedure to find the computer codes for the check engine soon warning light on a 2003 Buick Park Avenue Ultra. This happened to me this morning and I reset it by disconnecting the battery and let it correct itself. I am still curious as to what set this off. I installed a new EGR valve last week and I checked the gas cap. Any suggestions? Thanks ellis479
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