1999 Chevrolet Lumina Q&A
1999 Chevrolet Lumina Question: check engine light. stays on constantly.
there is a malfunction in the fuel control. get the code pulled and get back to us. Roy - mastertech6371
Really need to have the codes Checked for your Check Engine Light. see this article: http://repairpal.com/check-engine-light - dandd
change the gas that you are useing if you are useing 87 oct.all the time.the egr valve gets dirty and your O2sensors gets dirty two.it want let your computer read right. so do a fillup of 97 oct that cleans the egr valve and sensors.if it does not go off in about ten to twenty miles stop the car or truck dis connect the battry the possive side.for about 5 mins that will reprogram the computer.if the lights comes back on. keep useing 97oct for about two tanks and keepreprograming computer.its works for me. frank - Visitor