I have ls 3.9 the p0402 code keeps haunting me. I have replaced the left bank 02 sensors, egr valve and the egr pressure sensor. The car run great with no hesitation so I don't think its a cat. Each time I have replaced a component I have disconnect my battery to reset the code, and it keeps coming back.
Thursday, December 1st, 2011 AT 4:05 PM