While in my 2015 ram ecod 1500, it was driving with a low power and then I had 2 codes showing P026D-00/p0299-00 (fuel injection quantity A higher than expected. I went to the dealer and they found out the turbo charger was underboost.
Diagnostic from dealer: "Tech finds o-ring on outlet...
I just posted today about my case on glow plug, see if any information on it can help you to relate.
https://www.ecodieselram.com/forum/threads/under-warranty-engine-replacement-due-to-glow-plug.3186/unread
I have a 2015 ecodiesel RAM1500 3.0L with 59900 miles (just 100 miles warranty left) on it. Few weeks ago the check engine light was coming on and off. I went on vacation and when I came back the Glow plug light was flashing and I decided to go to the dealer to check it out. Thank God they say...