7657 SPN Fault Code

Name:

Engine Exhaust 1 NOx Sensor 2 Preliminary FMI

Description:

Used to identify the applicable J1939-73 FMI detected in the second NOx sensor by the manufacturer�s sensor control software in exhaust bank 1. In the case of multiple failures the most severe is communicated. This sensor is located at the intake of the SCR system if an SCR system exists.A value of 31 is sent to indicate that no failure has been detected or this parameter is not supported.

7657 spn fault code name is Engine Exhaust 1 NOx Sensor 2 Preliminary FMI. If you don't take the time to look into 7657 spn fault when it arises, it can add up quickly. One small issue like 7657 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 7657 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.

7657 SPN Fault Code

Name:

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