7521 SPN Fault Code

Name:

Aftertreatment 1 Diesel Exhaust Fluid Control Module 2 Relay Control

Description:

State signal which indicates when the DEF control module 2 relay of aftertreatment 1 is being energized. On means the ECU is powering the Aftertreatment 1 DEF dosing unit relay. Note that the ECU is external to the relay.00b = Off 01b = On: The ECU is powering the DEF dosing unit relay 10b = Error 11b = Unavailable

7521 spn fault code name is Aftertreatment 1 Diesel Exhaust Fluid Control Module 2 Relay Control. If you don't take the time to look into 7521 spn fault when it arises, it can add up quickly. One small issue like 7521 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 7521 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.

7521 SPN Fault Code

Name:

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