How important is the O2 sensor?

[unhygenix]

Hi All,
I had a engine check show up and the error code it spews out is "1221" which is to do with the O2 sensor.

How serious a problem is this? Can I drive with this thing on?
Please tell me what is the best thing to do?

Thanks,
Praveen

[winfred]

you can drive with it on. 02 codes are not allways the sensor itself, air leaks and bad tune up are common causes, out of adjustment/dirty throttle body can screw with it too

[unhygenix]

you can drive with it on. 02 codes are not allways the sensor itself, air leaks and bad tune up are common causes, out of adjustment/dirty throttle body can screw with it too

So would the light go away? Or should I reset it and check if it happens again?

I also heard that it is kind of a reminder, is it so for a 95 525i?

I am planning to give the car a rip to get rid of deposits, is this a good idea?

Thanks,
Praveen

[winfred]

id check over everything for any obvious air leaks or any other problems and reset, that was much older cars that had 02 reminder lights, a good flog couldn't hurt


So would the light go away? Or should I reset it and check if it happens again?

I also heard that it is kind of a reminder, is it so for a 95 525i?

I am planning to give the car a rip to get rid of deposits, is this a good idea?

Thanks,
Praveen

[unhygenix]

Thank you, I feel much better now. What exactly do you mean by obvious air leaks?
My fuel tank cap was stolen 2 days ago, could that be a reason?

Thanks again


id check over everything for any obvious air leaks or any other problems and reset, that was much older cars that had 02 reminder lights, a good flog couldn't hurt

[winfred]

that could piss it off, air leaks as in cracks in the air boot or disconnected vacuum lines coming off of the valve cover


Thank you, I feel much better now. What exactly do you mean by obvious air leaks?
My fuel tank cap was stolen 2 days ago, could that be a reason?

Thanks again

[unhygenix]

that could piss it off, air leaks as in cracks in the air boot or disconnected vacuum lines coming off of the valve cover