The fault code is set due to the catalytic converters inability to properly perform its function. At 160k miles it needs to be proven to be faulty and condemned properly.
June, 7, 2008 AT 12:49 PM
Thanks Dr Hagertry for a quick response and it turned out the catalytic converter was an OBD I type and I'm betting it was installed as a cheap and quick fix before the I bought it at an auction two years ago.
I replaced it with an aftermarket OBD II catalytic converter and my high NOX and the Check Engine light are gone.