Hi,

My 1998 Elantra 1.8L auto failed for Nox. Not too high 903 (756 passes). Am I correct in saying that this car has no EGR? I tried high octane gas, oil change, injector and intake cleaning, fuel filter. No good. Before I change the cat, I wanted to see if anyone else has had this problem. The car does have 165000 miles.

Thanks