4446 SPN Fault Code

Name:

Aftertreatment 2 Outlet NH3 Gas Sensor Power In Range

Description:

Indicates that the power supplied to the aftertreatment outlet NH3 gas sensor is within the manufacturer’s specification in exhaust bank 2.00b = Heater element is not in range 01b = Heater element is in range 10b = Error 11b = Not available

4446 spn fault code name is Aftertreatment 2 Outlet NH3 Gas Sensor Power In Range. If you don't take the time to look into 4446 spn fault when it arises, it can add up quickly. One small issue like 4446 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: The name and description of 4446 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.

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