02 sensor
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dwight
- SLE Member
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02 sensor
which 02 sensor is responsible for the code cat sys efficiency below level bank 1. Is that upstream or downstream. Do i need to replace both of them.
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steelmanwy
- SLE Member
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Re: 02 sensor
It's downstream, after the cat. Could be a bad sensor or it could be the sensor is reporting correctly and you need a new cat.
Last edited by steelmanwy on Tue Feb 15, 2011 10:42 am, edited 1 time in total.
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Kurt
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'03 Bonneville SE
'07 Yukon XL
'00 K2500 Crew
Kurt
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'03 Bonneville SE
'07 Yukon XL
'00 K2500 Crew
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00Beast
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Re: 02 sensor
There is a different code if the O2 is bad. However, you might want to replace it just to be sure. It is the downstream one, as said before.
Bye Bye:
RIP sandrock
RIP sandrock
Sirius wrote:Think about it. You’re tooling down the road in your Prius, knowing full-well that this thing being green is as big a sham as federally mandated ethanol-enriched gas, Russia pulling out of Ukraine, and Obamacare.
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dwight
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- Year and Trim: 2000 pontiac bonnville ssei. what is trim?
- Location: oklahoma
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Re: 02 sensor
If the cat is bad, does it make a rattling noise? I noticed the thin metal that covers the downstream cat. It is reveted on, do i revet them back on or just use bolts? thanks!
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00Beast
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Re: 02 sensor
Yes, if the cat is rattling it is bad.
The shielding covers the wires and needs to be removed. I used self-tapping screws when I did mine.
The shielding covers the wires and needs to be removed. I used self-tapping screws when I did mine.
Bye Bye:
RIP sandrock
RIP sandrock
Sirius wrote:Think about it. You’re tooling down the road in your Prius, knowing full-well that this thing being green is as big a sham as federally mandated ethanol-enriched gas, Russia pulling out of Ukraine, and Obamacare.