Need assistance
 

Hey there guys Im becoming crazy lol. I currently have an 01 dodge ram 3500 5.9L cummins 6speed manual The truck has been spuddering under load. 1st I had a apps sensor code re calibrated and it continued to come back. I replaced the sensor and problem solved. No the truck continues to have the same issue will run fine for 4/5min. Then it looses power. It feels like loss of fuel but my fuel guages are showing 20/22psi consistent. I have a fass loft pump. Codes that appeared are P0370, P1689, P0237, P0121, P1690 and P0122. One I cleared the codes and ranned the truck it ranned fine for about 15min. Note new apps sensor, camshaft sensor and map sensor. Issue continues please help. Thank you in advance.