Freightliner MT45 Bread Truck ISB6.7 ISN 74105403 VIN 4UZAAPFD3JCJL3237 MT45 was not listed in Vehicle Information so I listed it here. Truck has been back in shop 4 times always same codes 1922,3382,2639,1921,6255. I have replaced EGR Valve, EGR Diff Press Se... Login to read more.