My check engine light came on in my 2003 Toyota Matrix,
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2003 Toyota Matrix Question: My check engine light came on.
Answer #1DaveJHM December 02, 2010, 02:24Master
You will need a diagnostic test performed to determine what has caused the light.
First, check your fuel cap - is it secure? A loose cap will cause the light to come on.
Otherwise, here is a listing of shops near you that can help..