OBDII failed self test smog test failed

[kellerje]

Originally Posted by Low Saturn

You have to do this:

http://www.differentracing.com/forum...ead.php?t=1505

Are there specifics on the driving diagnostic? Can I do this on a dyno? Do they have to be done in order and all at the same time or can I perform each of these one at a time. Where would you find the open road to do all this without stopping?

I have had the same issue listed above. I do not have a problem with my vehicles running temp. I don't suspect the thermostat in any way. I did just reset the codes after replacing the IAC TPS ERG plugs/wires and intake manifold gasket. I've driven 1200 miles since then. It passed emissions and failed the diagnostic.