Quote:
Originally Posted by 370zBoyz
Test pipes installed that have J bends with Z1 Oxygen (O2) Sensor Extension Bungs and they threw up only that code.
Only have Stillen CAI long tube.
Was hoping the J bend and O2 extensions would keep the pesky CEL away until I can get a tune.
Any ideas besides removing the CEL via OBDII or is tune the only option at this point? Also, is Bank 2 the driver side?
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You can do test of switching post-O2 sensors to see if the bank 1 goes lean first. If so, then it's either one of the extensions is going wrong or one of the post-O2 sensors is broken.