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Which block to VAG to see which one of the O2 sensors needs to be replaced?

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Old 01-09-2006, 01:09 PM
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Default Which block to VAG to see which one of the O2 sensors needs to be replaced?

when I was VaG'ing the car's readiness codes..
the O2 sensor showed that it failed..

so, which block do I read to see if its the pre or post cat O2 i need to replace..?

Thx
Old 01-09-2006, 04:44 PM
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B1S1=pre cat,B1S2=post cat
Old 01-09-2006, 05:10 PM
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Default what does B1S1, B1S2 stand for..? I thought VAG blocks were in 3-digit numbers ??

(ie. 003 for MAF...etc)
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