Fault Codes:Hyundai HX220 NL EPFC 4452(520668-31)
Fault Description:
Aftertreatment outlet NOx sensor closed loop operation -Condition exists.The maximum dosing adjustment has been reached. Closed-loop operation of NOx sensor at the post-treatment outlet - this situation exists. The maximum injection regulation has been reached
Fault Location:
Possible reduced engine performance. It may lead to a decline in engine performance.
FairTradeMachinery
“You Design the Vision. We Handle the Hard Parts.”
Helping Global Buyers Access Better-Value Machinery and After-Sales Solutions.
As China’s Leading Global Used Machinery Exchange Platform, we sits at the intersection of IoT technology and B2B commerce. That means real-time inventory data, verified seller profiles, and a transaction process designed for cross-border buyers who can't always inspect machines in person. Our users in China have exceeded 1.5 millions meaning we have the first source of excavator owners and the equivalent number of machines. This means we can cover all the popular models and even specific needs, no matter of the status.








