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Tahoe PO300 Code

Discussion in 'Chevy Truck Talk & GM News' started by Jbugg, Jul 29, 2011.

  1. Jbugg

    Jbugg New Member

    Could anyone help me with a few issues that I am having with my 05 Tahoe? I have a Random Multiple Misfire code showing on my scanner. I replaced the plugs and plug wires but it still misses. I recently replaced the transmission but I am not sure if that had anything to do with the
    misfires.It was running ok until I replaced the transmission. Does anyone have any Ideals?
  2. 99'HEARTBEAT

    99'HEARTBEAT Moderator Staff Member ROTM Winner Platinum Contributor 1000 Posts



    Trouble Code....P0300
    may mean that one or more of the following has happened,

    • Faulty spark plugs or wires
    • Faulty coil (pack)
    • Faulty oxygen sensor(s)
    • Faulty fuel injector(s)
    • Burned exhaust valve
    • Faulty catalytic converter(s)
    • Stuck/blocked EGR valve / passages
    • Faulty camshaft position sensor
    • Defective computer
    Also what Brand of Spark plugs did you go with and install???

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