I'm not familiar with them. Similar to the CEL?

Anybody have a list of the Codes?

 

CEL is your Check Engine Light.

DTC are Diagnostic Trouble Codes.

DTC's are generally the result of the CEL coming on, though some DTC's are stored in the PCM/ECM without kicking a CEL.

Hope that helps.

 

As far as a list, here's a pdf file for Ford DTC's.

 

Very helpful, Thank You.

I was changing the "Tune" from Performance to Tow and two DTC's showed. CEL has not come on.

According to the DTC's my "Catalyst System Efficiency Below Threshold (Bank 1)", that was first code. Second code is the same only Bank 2.

I have aftermarket Catted Down Pipes....

 

NP, you're welcome.