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
Reload this Page > 17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High
Notices
S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002
Sponsored by:
Sponsored by:

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

Reply

 
 
Old 11-11-2009, 10:01 PM
  #1
Audiworld Junior Member
Thread Starter
 
Join Date: Apr 2008
Posts: 50
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
Thread Starter
 
Join Date: Apr 2008
Posts: 50
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

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
 
 
 

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
phoneyman
A4 (B5 Platform) Discussion
0
11-27-2005 01:30 PM
SOLD2000-1.8TQMSport
A4 (B5 Platform) Discussion
8
11-08-2004 12:04 PM
Pest
A4 (B5 Platform) Discussion
3
03-23-2004 02:20 PM
AFOUR1.8TQ
A4 (B5 Platform) Discussion
0
02-24-2004 08:52 AM


Thread Tools
Search this Thread
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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 07:27 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: