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check engine light

Discussion in 'GM Powertrain' started by pittbull, Sep 12, 2010.

  1. pittbull

    pittbull New Member

    my 1997 suburban has a code p0300,p0151,p0131 .i need help how to fix the problem .
  2. MrShorty

    MrShorty Moderator Staff Member 1000 Posts

    All three codes could have a single cause. I'd probably start by investigating why the O2 sensors are reporting lean. "By the book" one usually starts diagnosing O2 sensor codes by checking the fuel pressure to make sure the fuel system is running right. Look for any significant vacuum leaks. I might pull the spark plugs to see if they indicate whether the engine is running lean or rich.
  3. pittbull

    pittbull New Member

    i will start with the O2 sensors thanks for the tip. will keep you posted
    thanks MrShorty
  4. pittbull

    pittbull New Member

    mrShorty ,i found a exhaust leak, i fix it and the check engine light has not come on.

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