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trouble code help

Discussion in 'Ford Trucks' started by salopez, Oct 5, 2009.

  1. salopez

    salopez Senior Member
    Messages: 876

    hey guys here are the latests codes that my truck is throwing...I know what they say, but could use more help diagnosing the problems...
    p0500 vehicle speed sensor fault
    p1247 turbo boost pressure low
    p1280 intergrated control panel circuit out of range low

    any help would be great!
  2. wewille

    wewille Senior Member
    Messages: 311

    99 f-350 right???

    For the p0500 check AC output of the differential speed sensor with the rear wheels spinning between the LG/BK and the RD/PK wires. AC output should show at least 1.25 at 30 MPH and increase as vehicle speed increases. The ABS module takes in the vehicle speed signal from the Differential Speed Sensor as an AC sign wave and sends it on to the PCM, instrument cluster, Generic Electronic Module, etc. as an AC square wave signal.

    For the 1280 what kind of scan tool do you have, you will need one that can datastream?? ICP stands for injection control pressure.

    For the 1247 start by checking your air filter.

    Check these few things then post back up!

    How does the truck drive?? It probly has low power???