Check Engine Light
January 29th, 2007, 4:03 PM
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Check Engine Light
I can get it to go off with a battery discconect, but after a short time it comes back on. Is it on because the truck has aftermarket dual exhaust? What is a remedy?
1999 new body z71 4x4 3 door 120,000
1999 new body z71 4x4 3 door 120,000
February 2nd, 2007, 2:21 AM
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RE: Check Engine Light
Look at the exhaust. If you still have the factory cat and a electrical sensor (o2) behind each one. I am assuming you had dual to the muffler factory.
If you have a cat back exhaust you should be fine. Take it to Auto Zone or Advance Auto Parts they will check it for free. If it says it is lean or rich check the o2's but keep in mind a rich burn can mean a bad plug not getting a full burn or lean can be from a dirty fuel filter.
If you have a cat back exhaust you should be fine. Take it to Auto Zone or Advance Auto Parts they will check it for free. If it says it is lean or rich check the o2's but keep in mind a rich burn can mean a bad plug not getting a full burn or lean can be from a dirty fuel filter.
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