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C15 Primary engine speed 190-12

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by jrjr, Mar 23, 2023.

  1. Mar 23, 2023 #1
    jrjr

    jrjr Bobtail Member

    1
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    Feb 3, 2023
    Wisconsin
    0
    i installed a 03 C15 into a truck and it starts and runs and everything except its throwing a check engine light for Primary engine speed 190-12. The engine is an MBN (to my knowledge), and doesnt have the crankshaft speed sensor near the bottom on the front cover, only has the sensor behind the cam gear. is there a way to either bypass that signal or delete it from the computer some how?
     
    jrjr, Mar 23, 2023
    jrjr, Mar 23, 2023
    #1
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  3. Mar 23, 2023 #2
    ‘Olhand

    ‘Olhand Cantankerous Crusty

    6,339
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    Jan 18, 2011
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    Are you reading that code off a laptop
    Or just manually determining by dash flashes??
     
    ‘Olhand, Mar 23, 2023
    ‘Olhand, Mar 23, 2023
    #2
  4. Mar 25, 2023 #3
    bjytech

    bjytech Light Load Member

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    178
    Nov 9, 2013
    Ohio
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    If it's a MBN (or any 70pin for that matter) It will have a crank sensor, if it doesn't even have the spot for the crank sensor on the lower left of the front cover it must be a motor that has been pieced together from an assortment of parts right or wrong at some point.
    It will run fine without seeing the crank signal, only way to get rid of the code is to have a crank sensor.
     
    bjytech, Mar 25, 2023
    bjytech, Mar 25, 2023
    #3
    Goodysnap Thanks this.
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