17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High - AudiWorld Forums

Go Back   AudiWorld Forums > Audi Models > Audi S4 / RS4 > S4 / RS4 (B5 Platform) Discussion
Log In 


S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 11-11-2009, 10:01 PM   #1
Audiworld Junior Member
 
Join Date: Apr 2008
Posts: 49
Default 17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High

Can someone please confirm which Oxygen Sensor this is supposed to be:

17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High

The check engine light that was triggered by this code has gone away not however...

Are there any other problems that could cause this code to be logged?

I have noticed my mileage is a little worse than it was half a year ago and apparently bad ox sensors can cause this, no???
valentine1 is offline   Reply With Quote
Old 11-12-2009, 03:12 AM   #2
AudiWorld Member
 
Join Date: Sep 2004
Location: Austin,Tx
Posts: 468
Default

Passenger front, which is the easy one to replace.
Texas Twin T is offline   Reply With Quote
Old 11-13-2009, 01:20 AM   #3
Audiworld Junior Member
 
Join Date: Apr 2008
Posts: 49
Default

Awesome thanks.
valentine1 is offline   Reply With Quote
Old 11-13-2009, 06:09 AM   #4
AudiWorld Senior Member
 
Join Date: Apr 2009
Posts: 1,902
Default

Quote:
Originally Posted by valentine1 View Post
Can someone please confirm which Oxygen Sensor this is supposed to be:

17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High

The check engine light that was triggered by this code has gone away not however...

Are there any other problems that could cause this code to be logged?

I have noticed my mileage is a little worse than it was half a year ago and apparently bad ox sensors can cause this, no???
I'm not sure what it is in the o2 sensor that causes this code but it typically means that the sensor is failing. If it was totally Kaput you'd have a "short to ground" code. Yes, a bad O2 sensor can decrease your fuel efficiency.
donromani is offline   Reply With Quote
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need a hand!!! alright i changed all my vac lines, tested comb vavle, changed secondary pump KARMAD A4 (B5 Platform) Discussion 9 02-21-2007 08:09 PM
finally got my vag.com up and only got two codes phoneyman A4 (B5 Platform) Discussion 0 11-27-2005 01:30 PM
VAG codes from my car, what's your take on them? SOLD2000-1.8TQMSport A4 (B5 Platform) Discussion 8 11-08-2004 12:04 PM
Trouble Code Help Pest A4 (B5 Platform) Discussion 3 03-23-2004 02:20 PM
how do I fix this? AFOUR1.8TQ A4 (B5 Platform) Discussion 0 02-24-2004 08:52 AM


Tags
17521, 2001, a4, a8, audi, b1, b1s1, high, internal, lambda, location, oxygen, resistance, s1, sensor

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 04:04 PM.