Engine light.

[retleo08]

My check engine light comes on when I'm towing a 13000lb 5th wheel. Any ideas? 2016 Ram 3500 Cummins.

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[south7west]

Swing by your local auto parts store and have them check it out. It is impossible to tell what it means without having an electrical hook up to diagnose it!

 

[huntergreen]

Have you checked for codes ?

 

[JohnnyMac]

Is it while under load/coasting or after towing for a while, or as soon as you hook it up, up hill/down hill, freeway speeds/in town. Need more info.