I know this has been a topic of convo several different ways and times, but here it goes. I have a 2015 ecodiesel bought brand new. Currently has 44000 miles. I use this truck primarily for towing but have always kept it up one all service mostly before due. The truck has no egr, not throttle control module at all. Are intercooler pipes, afe full exhaust no cat or dog strait from turbo. Afe cold air. Has been tuned through a place in Utah cant remember name off the top of my head. Truck randomly went into limp mode with the p0299 and service throttle control module on dash. Took it to a dealer who in turn reloaded the updated factory tune back into it and sent me up the road with 100 less in my pocket. Sent ecu back to Utah and they cleared everything back to being deleted but now truck gets maybe 19 lbs of boost, normal was 27 to 28. Takes forever to get any boost to build. If I reset everything I can get maybe 3 minutes or less before limp mode and check engine light. I am totally at a loss with this truck. Any advice would be helpful. Side note. I'm not sure my tune came back correct. It was during the time the epa was hitting diesel shops so I know I need to start there but that still doesn't fix the original issue.