code 72

[impressive1]

My 96 neon has a trouble code 72, I understand that this is a catalytic converter problem. The question is how do i determine whether the converter is bad or if something else is going on like a false o2 reading or a false maf sensor reading. I just want to make sure that I definately have a bad converter before I sink the money into a new one.

Thanks

[das2123]

The simplest thing to do is to reset the code and see if it comes back.

Next step is to measure the voltage at the oxygen sensor on Bank 1 (the rear sensor, or the sensor after the converter). The voltage should be low and steady (~200mV, depends on the vehicle). If the voltage varies (e.g. 100mV to 600mV) then it's time to replace the catalytic converter. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it