A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

need help translating this code...

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Old Sep 20, 2004 | 09:10 AM
  #1  
4x4a4(nomore)'s Avatar
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Default need help translating this code...

16806 P0422 Main Catalyst Efficiency - Below Threshold (Bank 1) B

O2 Sensor?

I have a hi-flo cat
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Old Sep 20, 2004 | 09:15 AM
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Default looks like it's time for a new front 02 sensor

what year is your car....if it's a 2000, you're in luck.
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Old Sep 20, 2004 | 09:17 AM
  #3  
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Default 99.5

any luck???
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Old Sep 20, 2004 | 09:19 AM
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Ray Khan's Avatar
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Default newp.....the $20 VW won't work for you

how many miles on your car/02 sensors? Just to clarify...it's B1S1 right? That Bank 1 S1 is the front one. I think B1 S2 is the rear one.
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Old Sep 20, 2004 | 09:25 AM
  #5  
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Default no worries, thanks anyways

I have 90K on the car and o2 sensors. I'm not sure if it's the front or the rear. I was under the impression that the second o2 would go first.

Time to call up ECS
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Old Sep 20, 2004 | 10:33 AM
  #6  
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Default yeah it's time to get some new ones

the front is really the only one that matters as far as fuel mixture goes. The rear is just for emissions data.
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