Mine turned out to be a small exhause leak at muffler. They fixed the leak and retorqued to correct specs.. No charge. I now have a new code. P2001 NOx Trap Efficiency Below Threshold Bank 2 https://www.obd-codes.com/p2001. Have had 2016 RAM for less than a month and 2 check...
Just joined this forum. Looking forward to visiting with other owners. I just bought a 2016 EcoD Big Horn with 52,000. After a week a check engine light came on so I will have that checked. Dealer suggested that I buy a 4 year extended warranty. Recommendations.