What does the NOx prompt in the annual inspection mean?
1 Answers
The NOx prompt in the annual inspection means that the vehicle's nitrogen oxide emissions exceed the standard. Introduction to NOx: NOx refers to nitrogen oxides, which are brown exhaust gases with a pungent odor produced in large quantities when the engine is under certain load. When the engine exhaust is first emitted, the NO present in the gas is less toxic, but it is easily oxidized into other nitrogen oxides such as the more toxic NO2. After entering the alveoli, NOx can form nitrous acid and nitric acid, causing severe irritation to lung tissue. Only NOx exceeds the standard: It can be preliminarily determined that the three-way catalytic converter is faulty, possibly due to poisoning or aging of the converter. Adding 2 bottles of exhaust cleaner to clean the converter or having someone remove and clean the three-way catalytic converter on the exhaust pipe can solve the problem; if there is no three-way catalytic converter, install one.