yet another fault code

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Mar 17, 2007 | 04:15 PM

Bondga

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Senior Member

Joined: Aug 2006

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yet another fault code

17521- oxygen sensor: B1 S1:Internal resistance to high

anyone got ne clues as to why or what i need to do to ix it?

Mar 17, 2007 | 08:34 PM

david9999

4th Gear

Joined: Jul 2004

Posts: 4,354

RE: yet another fault code

It is a fault code for the oxygen sensor heater for the precat sensor. How many miles on the sensor. There is a way to test them, but if you are at 80K miles, you might as well replace it.

Mar 17, 2007 | 08:57 PM

Bondga

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Senior Member

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Posts: 1,159

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RE: yet another fault code

i go 64k on my car

Mar 17, 2007 | 09:42 PM

zrwhat

2nd Gear

Joined: Mar 2007

Posts: 1,117

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RE: yet another fault code

i would just replace it,unless you want to do a heater check, but i think you will need the audi scan tool.

Mar 17, 2007 | 09:44 PM

zrwhat

2nd Gear

Joined: Mar 2007

Posts: 1,117

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RE: yet another fault code

Special tools you will need for that, big waste of time, since its probably bad anyways, they are alwyas needing replaceing from what i have seen

VAG1526A
VAG1594A
VAG1598/31