slow egr response isn't too uncommon of a code on these, both stock and tuned, we can increase the tolerance a bit so the code isn't as easy to trip. It seems to mostly occur at light to medium throttle towards highway speeds, like pulling onto an on ramp gradually.
There are some stupid on ramps on 93 in NH that have on ramps that dump right onto the highway right as there is an exit 200 feet down the highway. About 2 or 3 fender benders each week, someones motoring down trying to merge at 60, the person in front gets scared comes to a stop and bammo!.
Anyone else get the 240f codes on a semi repeated pattern for a while then no issues for a few months then repeat? My 2013 did till I did buyback at 200k and same with 15. Every 20 to 30k miles for a few weeks then it quiets down.