Fault Codes:
Hyundai HX220 NL EPFC 4453（520669-31）
Fault Description:
Aftertreatment intermediate NH3 sensor closed loop operation-Condition exists.The maximum dosing adjustment has been reached. Closed-loop operation of the NH3 sensor in the post-processing middle - this situation exists. The maximum injection regulation has been reached
Fault Location:
None on performance. It does not affect performance.
