Originally posted by projectSHO89:
Again, I would urge caution and more time before trying this on another car with 0420/0430 codes.




If nothing else, what I have suggested doing WILL help to reduce exhaust emissions, and a vehicle that is getting P0420/P0430 codes needs all the help it can get.

That, combined with the fact that 1996-2000 vehicles can still pass an emissions check with as many as two readyness tests not complete (for those states that actually do an OBD-II scan), should help the odds of passing an emissions check.

Viewed as a last-ditch effort to avoid the expense of replacing a cat, this makes sense, unless you think it would cause damage to the vehicle.

I will report the results of my forthcoming emissions inspection as well as reporting if the code comes back or not after I have put some more mileage on it.