p0420

Ok So Your Gonna need 2 spark plug non foulers, drill,half inch metal drill bit. Step One is to takr one non fouler and drill a half inch hole all the way through the bottom of it. Step 2 Screw on Post Cat 02 sensor. Step 3 screw on non drilled non fouler Step 4 Put Assembly Back Into Post Cat Bung

Hi all first just want to say I love how helpful this forum and community is, this is my first post but have come here for awhile to find answers whenever I've had a problem. However this time is several different problems at once and don't know what to do or where to start. 2007 Caliber R/T...

Hi guys, Every time I've come here in the past for advice, I've gotten answers to solve my problems.... so here I am again! I know you guys won't fail me... The CEL has come on on my wife's Caliber, and when I had a diagnostic run on it, it returned a code P0420, which I see indicates a...

I had my '07 Caliber in to review a check engine light. P0420 Catalyst Efficiency DTC led to replacement of catalytic convertor, but the light came back on within 200 miles. Now they suggest replacement of Manivertor, which I've never heard of. Seems it is a convertor directly off the...