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International Automotive Technicians Network
Re: NOx Sensors and Catalyst diagnosis
Posted to Technical Discussion Forum on 2/27/2020

Take this with a open mind cause I have never touched a MB. However on a GM system the way I test NOx 1 & 2 is this- Get it good and warm and go drive it. 60 MPH cruise you should see roughly a 70% difference between the two. From a dead stop do a wide open th... Login to read more.