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2001 Audi A6 O2 Sensor

Tiny
REXLUV
  • MEMBER
  • 2001 AUDI A6
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 80,000 MILES
I am getting the following code using VAG: 17584 - Bank1: O2S (Lambda) Correction Behind Catalyst: Control Limit Reached
P1176 - 35-00 - - It seems to point to a problem with the rear behind the catalyst O2 sensor. How do I know which one. According to what I can find there are 2 sensors - one on the passenger and one on the driver side. How do I know which one to order?
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Sunday, October 25th, 2009 AT 1:15 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Drivers side after CAT code indicates O2 has reached the limit of its adjustment.
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Tuesday, October 27th, 2009 AT 9:22 AM
Tiny
REXLUV
  • MEMBER
  • 2 POSTS
I had my mechanic replace both rear O2 sensors with new. He cleared the codes but CEL came back again with same code.
I've read online the you might need to replace both front and rear O2 sensors. Should I try replacing the front ones as well now? Or could by catalytic converter need replacing.
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Sunday, April 25th, 2010 AT 5:28 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
The code P1176 function test is to check O2 before CAT
Have Tech scan O2 to see if it is providing correct data
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Monday, April 26th, 2010 AT 3:24 PM

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