Hey guys I initially had a whole in my egr pipe or tube whichever its called .....the pipe tht comes out the bottom of the egr and goes to i think the area of the bottom of the throttle body...i had a small leak there tht was revealed by a smoke test got tht tooken care of and now I'm getting a po133 code....my question is this related or separate and should i replace it and if so what would b the best part to replace it with...?? Its under warranty at AutoZone should I just go with tht....?? Thanks in advance.....

i am not sure but i dont think a slow O2 response is directly related to a tube u described. sometimes O2 goes bad by themselves they become what i heard a term "lazy", maybe thats the case, or maybe u have somehow contaminated it. again just wanted to chip in, but hope someone w/more obvious dirrect knowledge of it will assist u

Yeah I'm thinking I might have contaminated it....I'm wondering not tht the cause is gone will the code go away or do I need to change it all together....

i dont remember how its done exactly but there are ways to test O2 sensor even w/out scanners. U use a voltmeter, u have to know specificts on that sensor and u just check its voltage sendings. it should always fluctuate from one value to another, if O2 starts sending a constant signal that what they call Lazy. So u could try testing it out, since alot of O2 kinda expensive. btw if u clear the code, how soon does it comes back on?

It came back in two days....

Has your gas mileage deteriorated significantly lately?

Not significantly but i do only average 20.5 per tank which is low right and tht was before the ses light came on.

Sounds like you need to replace the O2 sensor to me.

I think I had the same issue a year ago with my Bonneville. Lazy O2. Instead of spending $80 for a new sensor, I went to the junkyard and pulled one for $10. Never had a problem since then. Of course, it probably won't last as long as a new one, but instead of spending $80 on a sensor and finding out it wasn't it, I felt it was easier and cheaper to get a used one first.

First of all, what did you do to fix the hole in the EGR pipe? Did you buy a new one, or just patch the hole? If you patched it, I would start there. If you bought a new one I would get a new O2 sensor.