I recently replaced the radiator, hoses, thermostat, plugs, and wires. Car was ran a few times with misfiring plug, now I get the CEL with code P0420 (catalyst operating below threshold). I know I can replace the cat for about $200, but I won't have the money for a month or two and am wondering if car is safe to drive? There is NO rotten egg smell, engine performs just fine with no misfires or loss of power. Gas mileage is fine too. But I need this car for work. Another question: worst case scenario, if cat completely fails, what happens? Also, after many Google searches came across the "spark plug defouler fix" and am wondering if this is legit? Will my car pass emissions? Don't have to have that done until 2012. Any answers or suggestions welcome, thanks so much!
have the same problem?
Friday, August 27th, 2010 AT 8:06 PM