What repairs might be necessary for a 1993 Chevy S-10 Pickup with 195,000 miles that failed the test

My vehicle failed its smog check with most of the readings being double the max. I took it in for repairs and had the thermostat, EGR solonoid, and oxygen sensor replaced. While these repairs did lower the emissions to almost passing the mechanic said I need to replace my catalytic converter. What I need to know is will this major repair be enough to have my vehicle pass or should I anticpate the possiblity of other repairs? If so what else could be causing the high emissions? The vechicle is in great condition for its age and milage and it was a total surprise that it failed in the first place. Thank you.

Answer:

The replacement of the Catalytic Converter will dramatically reduce emissions in all three categories (HC, CO and NO), however it is very important to ensure that in fact all other emissions systems are inspected, diagnosed and repaired prior to the CAT's replacement. We'll have to assume the smog station which diagnosed and replaced your Chevy pickup's oxygen sensor, EGR valve and thermostat, made sure all other emission systems are functioning properly. So we can be safe to say that yes, replacing your truck's CAT (or CATs if you have a dual exhaust) will get it to pass the smog check.

posted by SmogTips Support