different mechanics give me different answers for a changed catalytic converter. had it dx. and engine light still comes on. The last mechanic stated that i needed a double headed converter and I checked auto part store and it stated that I only needed a single headed converter and not a double headed converter? can you clarify this, please?
catalytic changed and engine light comes on. code po402, what does this mean? on 2003 Toyota Corolla
by tiredofit in Plainsboro, NJ on June 29, 2014
ANSWER by ziptie12 , June 29, 2014
P0402 is not the converter , it;s EGR system. P0420 is for converter below efficiency.