so a few weeks back i ran a true dual with cherry bomb extremes dumped. the pipe was cut and replaced a few inches behind the cat and O2 sensor. after driving i got a CEL after resetting twice its came back on repeatedly. it seems to come on after ive driven the truck pretty hard and ran some high RPM's

The Code its throwing is: P04030 which is low threshold bank 2

Any insight on what might be the issue would be greatly apreciated. Thanks

 

Check the exh manifold bolts on both sides of the engine for broken or loose bolts. The check the welds for any exh leaks. If all of that is fine then add non-foulers to the rear 02s. We have a DIY in the FAQ section

 

appreciate it