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    Volvo penta fault code

    Ok, I figured it out…128 is engine, 15 has to do with O2 sensors, 5 is low voltage or signal problem. I replaced all 4 O2 sensors…two up stream and two down stream. Turned out to be one of the down stream sensors was defective at the tip ( sensor tip). The upstream and downstream are different...
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    Volvo penta fault code

    Still can’t find anything on the internet to help me decode my engine fault! It’s just crazy that this info isn’t available! My fault code is MID: 128 PSID: 15 FMI: 5 I have a 2014 Cobalt 336 with twin V8 380 CE D engines. Volvo Penta EVC-E. Can anyone help?
  3. D

    Volvo penta fault code

    MID: 128 PSID: 15 FMI: 5 can anyone decode this please?
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