2001 Yukon O2 Sensor Problems

[belbers1]

Hey Guys,
I'm new at this forum thing, and I was wondering if someone could give me some help. I recently replaced the Bank 1 Sensor 2 oxygen sensor. It has been about six months, and the check engine light has come back on, saying it needs to be replaced. I bought the oxygen sensor, but shouldn't they last a long time? I'm not sure what the deal is, but this will be the second time I replaced it.

2001 GMC Yukon SLT
4x4
5.3L V8

Thanks for your help!

[danielsatur]

Are you sure, that you replaced the right sensor on bank 1?
Did you do a visual inspection on the H2O sensor wire?

[belbers1]

Yeah, we definitely replaced the right one. The wiring was acting weird before, but I made sure it was a tight connection. The light goes out every once in a while, so I am wondering if it could be faulty wiring or if the wire became loose again. I'll go make sure right now.

[danielsatur]

Isn't bank 1 on the drivers side, and sensor 2 down stream of the catalytic converter?
What brand is the H02 sensor?

[belbers1]

Yup. It is driver's side after the cat. The brand is some off brand from my local auto parts store. It is an OE Extra made by standard motor products inc.

[danielsatur]

How long is the Federal emission warranty on new H02 sensors?
Consider rolling down stream H02 sensors from bank1 to bank2.

[belbers1]

I have no idea what the warranty is. Sorry for being ignorant, but what do you mean by "rolling"?

[danielsatur]

Swap the H2O sensor (2) from Bank 1 (drivers side) to bank 2, on the passenger side.

I'am not sure of the warranty, but it's worth checking your Auto parts store.

[belbers1]

Oh, okay. That makes sense. I'll try that on monday. Thanks!

[belbers1]

it ended up just being the o2 sensor. the guys at the shop ran some tests and it kept failing this one obscure test. all of a sudden it started to work when we put in a new o2 sensor. they think it was some kind of short

[danielsatur]

Thanks for feedback, Did this sensor have a 1-year warranty?