549 SPN Fault Code


Retarder Speed At Point 3


Retarder speed of point 3 of the engine retarder torque map. Please reference PGN 65249.

549 spn fault code name is Retarder Speed At Point 3. If you don't take the time to look into 549 spn fault when it arises, it can add up quickly. One small issue like 549 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 549 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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SPNFMI Faults and Engine error code check tool. SPN code listing with names and descriptions.

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