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International Automotive Technicians Network
Re: Failed Nox At 25 Mph
Posted to Technical Discussion Forum on 1/21/2021

Good point. Exhaust leaks will not create Nox that wasnt already there, but they will prevent it from being catalyzed, (bad mixture to ignite cat) which will make a pass capable car fail, AND they make use of gas analyzer readings to diagnose flighty to imposs... Login to read more.