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2002 BMW 325i Question: my 2002 bmw 325i is sending a P0300 code what do i do to fix the problem

 

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let, Poquoson, VA, July 13, 2011, 09:02
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other code are
P1346 P1346 P1350 P1348 P1345 P1342

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  • Answer #1

    July 13, 2011, 20:38
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     Journeyman

    for p0300,
    Causes:
    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
    Possible Solutions:
    If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
    and I know this tool can reset your car code.
    http://chinasinoy.com/wholesale/bmw-gt1-dis-v57-sss-v39-compatible-with-all-computer-1252.html
    If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

    Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

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