'96 Accord 2.2 Non Vtec LX 4 door auto

The CEL came on the other day, and I checked it using the "Short the OBD/ turn the key to on" method and came up with Code 67. The car has over 200k on it, so I'm sure the cat is toast. My questions are:

Does the secondary O2 sensor affect the driveability of the car at all, or just give you the annoying Cell light? On my '05 EP3 the secondary O2 doesn't do jack, but the '96 Cord?

If ignored, what could be the end result of a bad CC? Can it get plugged or will it just hollow out?

TIA

 

The o2 sensor reads the exhaust and tells your fuel computer if the engine/mix is too rich or too lean. It only reads when its warm enough and it also helps with fuel economy So you may result in poor fuel economy with a bad or failed sensor. If bad fuel economy doesn't. Bother you then you don't have to replace it. There not too expensive tho.

 

This only applies to the front sensor (S1). On this model the secondary O2 sensors only function is to moniter cat condition. The PCM looks for a flatter O2 waveform on the rear sensor. The both waveforms for front and rear sensors are the same, The cat is not working and trips a code. So, the rear O2 sensor WILL NOT affect driveability.

 

The front works the drivability and a/f issues, the rear sensor is there to tattle on the converter if it ends up soiling it's pants.
That isn't saying you've a bad converter (by the way) since the sensor could (itself) be fibbing.

They can get lazy over time, unable to precisely report changing conditions. They have heater elements which can fail keeping them from reading properly. They can get sooted up from a previous no-start condition and not read properly.

I'd entertain replacing the sensor first. Stick with Denso or OEM Honda. I've had no luck with Bosch.

P