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2005 GMC Envoy bad O2 sensor

Tiny
KIMERUSKI72
  • MEMBER
  • 2005 GMC ENVOY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 52,000 MILES
I have a bad 02 sensor, and I smell fumes inside the cab, is this normal? And I am assuming it will make a person dizzy and disoriented if breathing the fumes over a period of time. Is this one of the symtoms of a bad O2 sensor? Please let me know

Thanks,

Kim
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Thursday, June 18th, 2009 AT 3:09 PM

3 Replies

Tiny
BRIAN 1
  • MECHANIC
  • 1,030 POSTS
Sounds like more of an exhaust leak, probably more so by the exhaust manifold, check for an exhaust leak first then post back.
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Thursday, June 18th, 2009 AT 7:41 PM
Tiny
KIMERUSKI72
  • MEMBER
  • 2 POSTS
Thanks for replying so quickly. I really appreciate it.

I had a diagnositcs ran on it and it came up O2 sensor. So I had it fixed. It did stop the fumes from coming into the cab. I was wondering were the fumes I was smelling dangerous? At times I had to roll down the windows cuz I couldnt breath. Basically my question is, what kind of fumes are they if the O2 sensor is bad?
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Sunday, June 21st, 2009 AT 11:33 PM
Tiny
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  • MECHANIC
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Yes the fumes from the exhaust are dangerous, its carbon minoxide your breathing. If you got it fixed then you should be ok, carbon minoxide is only dangerous if you breath it for long periods of time in an inclosed space.
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Monday, June 22nd, 2009 AT 10:06 AM

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