4091 SPN Fault Code

Name:

NOx limits exceeded due to Deactivation of EGR

Description:

Indicates that On-Board Diagnostics has determined that the limits for NOx in the exhaust stream have been exceeded due to deactivation of EGR.

4091 spn fault code name is NOx limits exceeded due to Deactivation of EGR. If you don't take the time to look into 4091 spn fault when it arises, it can add up quickly. One small issue like 4091 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 4091 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.

4091 SPN Fault Code

Name:

Description:

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