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  1. P

    Code P0426 and P0428

    When I scan vehicle code P0428 is set . When looking at data with KOEO the cat egt sensor is reading 1832 degrees but after driving it drops down to 560- 600 range . My question is isit the sensor in the exhaust manifold or the one on top of the dpf ? Any help would be appreciated My truck is a...
  2. P

    Ecodiesel code P0428

    I am having code P0428 set on startup. Scan vehicle data , shows exhaust temperature at 1832 F on key on engine off at cold engine temperature. Had oxygen sensor Bank1 sensor 1 replaced because there was no activity with it until driven a mile or two . O2 sensor still doesn't have any activity...
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