Replacing O2 sensors

[Burg Boxster]

I guess first question is why are you replacing "a couple" of O2 sensors? Rarely does more than one O2 sensor go out at a time. More likely you have MAF issues (as I think you already know based on other posts) or a vacuum leak... both often disguise as O2 sensor problems. Did you test the sensors w/ a multimeter to ensure they are bad?

Penetrating oil is fine to use.. just keep it off the new sensors and it will help if the car is warm.

Good luck

[JAAY]

My Bosch napa sensors came with water tight buildable connectors. They look like little black boxes.

[Bala]

Originally Posted by JAAY

My Bosch napa sensors came with water tight buildable connectors. They look like little black boxes.

I went with parts train ones. If I'm filling up the money pit I might as well fill up a little at a time!

[Bala]

Originally Posted by Burg Boxster

I guess first question is why are you replacing "a couple" of O2 sensors? Rarely does more than one O2 sensor go out at a time. More likely you have MAF issues (as I think you already know based on other posts) or a vacuum leak... both often disguise as O2 sensor problems. Did you test the sensors w/ a multimeter to ensure they are bad?

Penetrating oil is fine to use.. just keep it off the new sensors and it will help if the car is warm.

Good luck

Durametric reported the sensors (one on bank 1 and the other on cylinder 4-6. I looked at them both and one was totally swamped with oil which I cleaned out but think it might have done something. The other was molested by PO as the connecting wire is almost a foot long. I'm not kidding!

The o2 errors were there even before the MAF issue surfaced.