Both yellow engines are lit up on dash..what is the problem???
Both yellow engine lights are lit up..1 says
check..other is just i light. Truck runs fine, but they
lit up just don't have a clue. 2012 cascadia DD15
Then you have a DTC trouble code being set, it can be read with an OBD scanner, if you don't have one, take it to a mechanic, dealer, or even an auto parts store. Parts stores will often read them for free.
Search Maintenance & Repair Questions
Maintenance & Repair Experts