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FMI 637 CAT Fault Code

High Aftertreatment Regeneration Device Secondary Air Differential Pressure

Cause :

This sub type is used for control module Internal Failures that cannot be assigned to a specific sub type.If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.


Don't forget ! When a fault code pops up, CAT's Uptime Center is automatically notified via an cellular link, and it alerts the truck's owner by prearranged methods, usually email or phone calls.

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