O2 Sensor Problem

[chatham]

Okay, I asked questions about this already, but still didn't get things cleared up. My check engine light is on, it reads a 41, which is:

"Primary Heated O2 sensor heater circuit
Open or short in Primary O2 sensor heater circuit, defective Primary O2 sensor heater circuit"

So I checked the exhaust pipe (where the O2 sensor is supposed to be located on my 91 EX-R). There doesn't seem to be any sensor there. There are wires hanging down there that aren't connected to anything, I assume they are for the sensor. My questions:

1. Is this my primary O2 sensor that is missing?
2. Can my car work without an O2 sensor?
3. It says Primary O2 Sensor Heater Circuit - what is the heater circuit?
4. Do I just get an O2 sensor, install it in my exhaust pipe, and connect the hanging wires to it to make it work?

Any help would be appreciated guys. Thanks.

[b33rnut010]

is there an O2 bung for the sensor? after market header? looking near the cat right?

[starkrice]

all you need is a o2 and rig it up and you shud be cool and your car can run without a o2 but the ECU will not read your AIR and FUEL MIXER which means that your car will run shity

[chatham]

is there an O2 bung for the sensor? after market header? looking near the cat right?

No there is no bung for the sensor. I assume that the exhaust got redone, and the people at the muffler shop didn't realize that there was supposed to be a sensor there.

[chatham]

Anyone else know anything?

[PRIMOCB7]

Anyone else know anything?

http://www.cb7tuner.com/vbb/showthread.php?t=35441

^^ a previous thread YOU started based on the same topic. scroll down and i posted what you can have done to fix this.

[chatham]

I understand that that thread exists, but I didn't get all the information from it that I wanted.