[Sensei]

Which one should I diagnose first? Engine has tapping/knocking that is more noticeable at lower rpm. During regen the exhaust smells in the cab really bad. Cylinder cutout test ran without stalling when isolating each cylinder by themselves. Sounded like shit though. Fuel leak down test was little to no drop in pressure after truck was turned off. EGR diff pressure sensor was changed last year. Removed EGR valve and it looked clean. DPF is not clogged pressure and soot levels are normal/low.


Two of these codes keep appearing. The EGR fault and the Gas Pressure Sensor fault. Ignore the maintenance code. The other two are new.

Please help thx