Expert: Skip Bollinger - 11/14/2006

Question
I have a 2002 grand prix with the 3.1L v6.  I am have antifreeze loss and a Code P0401 (low EGR flow)  Someone told me it was my Upper intake manifold gasket gone bad.  Is this true and what kind of damage could this cause if not fixed right away?

Answer
Jeremy,
  Sorry to take so long to respond but I'm a Parts Specialist, NOT a tech. In my Bio, I put I was a Parts Specialist but when I receive inquiries such as yours, I have to rely on friends and customers to help me help you. Here is what I have learned...
  I'm told the EGR Pressure Sensor which is mounted on the intake could be bad. It has 2 hoses going to it. Pull the 2 hoses and see if you get any water. If you do, you have found the problem. To solve this problem, you need to replace the upper AND lower intake gaskets and the EGR Pressure Sensor and gasket. I was told this is NOT a job for a novice but if you have sufficient mechanical experience, you should be able to make it happen.
  Again, I'm sorry to take so long to get back with you. I hope this helps and good luck...
  Skip
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