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cat delete

Old 04-08-2011, 02:10 AM
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Thread Starter
Join Date: Apr 2010
Posts: 26
Default cat delete

Hey guys quick question.
First of all i have a 1999.5 Audi a4 I am buying a cat delete and exhaust for it within the next week. I have been having a check engine light issue that comes on about once a week, and its the same code every time. It say catalyst below threshold. I was told this was because my o2 sensor was bad but come to find out i had it looked at and they said it was fine... So my question is when i put that cat delete and exhaust on will i have a check engine light on all the time? or will it just keep coming on if i cannot figure out the problem with the code that keeps coming up? And yes the cat delete has both ports for the o2 sensors.

INPUT PLEASE and thank you
Old 05-12-2011, 02:51 PM
1st Gear
Join Date: May 2011
Location: East TN
Posts: 1

I have the same car (mine is v6 awd) and have the same code.

I was wandering where you're going to get your cat delete from?

Also, I assuming our cars will still run fine with cat since a change of backpressure?

All cars are different but I had a Subaru and it was fine catless.

Old 05-23-2011, 01:33 PM
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Join Date: May 2011
Posts: 14

Generally that code does relate to 1 of 2 things .. one being a clogged or damaged catalyst in the converter or a bad O2 sensor.

Since you said you have a cat delete straight pipe in I imagine that has to means its one of your sensors, most likely a post-cat sensor.
Old 05-29-2011, 12:10 PM
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Join Date: May 2011
Posts: 3

Can u cat delete any audi
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