Criterion Catalysts and Techs

Trouble Shooter
Motor; 2/1/2009; 1093 words; Good techs require solid evidence...intermittent DTC P0420 (catalyst efficiency below...emissions to determine catalyst efficiency. Instead...emissions. OBD II catalyst efficiency tests...can assume these criteria are met. If it...

Think Like The PCM
Motor Age; 1/1/2007; 2796 words; ...shop I've ever worked in. I've seen techs stumped by what should have been relatively...exhaust gas recirculation (KCR) and catalyst elhcieiicy monitors, are run once per...conditions. Each monitor has its own criteria, and its own defined drive cycle. When...

Trouble shooter
Motor; 8/1/2003; 1107 words; ...information available to all techs, regardless of their vehicle...engine is running and all enable criteria have been met. If a misfire...and to determine the failure criteria to be used by the PCM. The...is so severe that immediate catalyst damage will occur if the current...

Keeping the cat purring
Motor; 6/1/2001; 2285 words; ...system monitors the catalyst for efficiency, so...exhaust. In fact, these criteria must be met wherever...is over 3 psi, the catalyst is most likely going...customer. Note that techs have seen cases where...are called threeway catalysts because of their ability...controlled by three-way ...