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Jay
Jay, Mechanic
Category: Car
Satisfied Customers: 596
Experience:  5 yrs experience with Gm, 9 years in automotive shops trained at SAIT
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WHAT CAUSES AVEHICLE TO TEST HIGH NOX

Customer Question

WHAT CAUSES AVEHICLE TO TEST HIGH NOX
Submitted: 8 years ago.
Category: Car
Expert:  Jay replied 8 years ago.
HelloCustomer High NOX emissions are created when a vehicle has very high combustion temperatures. High combustion temperatures could be due to too much fuel or too little fuel. It is tough to say exactly what is causing the problem on your truck. Your EGR is designed to lower the combustion temperature.

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