Hi, i have a Kobelco sk135-3 that has fault code 01028 and is giving me grief to get it fixed, chain of events rubber hose from intercooler blew off, gave code 01028, machine derated, refitted hose , still derated with fault code 01028. replace turbo complete still derated with fault code 01028. replaced turbo boost pressure sensor. still derated with fault code 01028. Auto sparky checked wiring to boost sensor power and earth on boost sensor, good ground and 5 volt power as Kobelco said should be there. checked engine parameters boost pressure 100kpa when starting up, about 60% revs it goes up to 181kpa boost. removed boost sensor plug while engine running and it through 2 other codes, they disappeared as soon as i plugged the boost sensor back in. not sure what to do next? maybe a new ecm? Have I changed the right sensor? Is it a dpf sensor fault? Or turbo boost sensor fault ? i have checked another post on here with machine with same fault code by searching 01028 and there are 2 sensors Atmospheric pressure sensor Dfp_APPSync and sensor Supply voltage monitor 2 DFP_SSpMon2
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