C7 Scan Gauge Code

Thanks for the responses.. It seems to be running okay and no codes on the Info Center.
Jack Buening

One possibility I came across is “J1939 data link communication error”.

Don't know if these will help or not: Cat Engine Codes (select Download once you've clicked on the link).

ID...tells you what’s wrong. ie: oil pressure, water temp etc. Sorry but I do not know what the 639 code pertains to.

FM...stands for failure mode. 12 means a device or component is not working properly. So likely it’s a sensor that needs replaced.

CNT ....stands for count. Number of times it’s failed.

Hopefully someone with a C7 will be able to tell you what the 639 code is.

Or you can call Linear Logic at 1--888-433-5664.

Do not have that hardware but those codes almost look like "log on information".

ID
Firmware version
Control

But that is a pure guess

Google Scan Gauge Manual (Turns out several companies make scan gauge) and pick the one that matches the maker of YOUR gauge.

Hmm.. no manual? I found that same error on another site but the pdf download was weird.