Mazda MPV 2001 Check Engine Light with P0421 Code: Cause, Repair, and Cost

Model: Mazda MPV Fault Code: P0421 Posted: 2009-01-28 23:13

Hi everyone, I'm new to this forum and seeking expert advice on a check engine light issue I've encountered. I was driving during the winter and suddenly noticed the check engine light came on. My friend checked it using an OBD2 scanner and found code P042