...converter? The engine light was on so I had the codes pulled. I replaced the two O2 sensors and the crankshaft sensor. About 50 miles later the engine light came back on and I got the p0420 code. I had it reset a couple more times but the same code keeps triggering the engine light. What does this code really mean? Do I need to replace the catalytic converter or should I try replacing the the O2 sensor again (the auto part guy suggests replacing the O2 sensor again as they are sometimes faulty).
I get error code of P0420 in my1996 Jeep Grand Cherokee. It references the catalytic...
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