2003 Toyota Corolla Q&A
2003 Toyota Corolla Question: Check Engine Light
Check engine light comes on and code reads catalyst efficiency below threshold clear code and Check engine light comes back on after some time. What is the remedy to get threshold above catalyst efficiency to keep Check engine light off permanately. - Visitor
the catalytic converter will most likely need to be replaced, although, a faulty oxygen sensor can sometimes give false catalytic converter codes. - devilscap4
Check light just came on stays on but soesn't drive different. What is involved in servicing and about how expensive to fix. I bought extended warrenty with car 5 month ago.
My check engine light went on recently and I began to notice that my car would jerk when accele...