MBE 4000 codes???

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jakeman, Jul 17, 2015.

  1. jakeman

    jakeman Bobtail Member

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    Jun 3, 2015
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    I have a 05 freightliner with MBE 4000. It was running fine, till I sprayed the engine off. It doesn't have the power it did from 1500-2000rpms. The codes are 128-102-03. The 2nd one is 128-105-03 that code is intake pressure circuit failed high. I don't even have a intake pressure sensor, and the 3rd code is 128-174-03 which is fuel temperature circuit failed high. I changed the fuel temp sensor out still nothing.
     
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  3. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

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    You probably got some water in a connection somewhere, possibly one or more of the Weatherpack plugs isn't sealed as well as it needs to be. Just an educated guess from the timing of the problem in relation to washing off the engine.

    Hopefully someone will have more specifics, but I'd take it to a Detroit engine shop, like the one at Altoona, IA. Or ask them for recommendations.
     
    jakeman Thanks this.
  4. jakeman

    jakeman Bobtail Member

    19
    5
    Jun 3, 2015
    0
    Well, I kinda thought the same thing. In the morning, I'm going to take all of them apart, and hit them with some air. I think I'll leave them unplugged all day too. Its going to be 97 tomorrow.
     
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