why would my check engine light be on if things were changed and reset . on 1999 Dodge Stratus

I changed the air filter , the spark plugs in wires, also the O2 sensor and gas cap. what else can be keeping my check engine light on.

by in Philadelphia, PA on February 13, 2013
2 answers
ANSWER by on February 13, 2013
Lots of differant things...save yourself further frustration and get it diagnosed.
ANSWER by on February 13, 2013
agree with #1.it could be circuit issues and not sensor malfunction
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