I am toying with the idear of removing the secondary air injection system on my s3. As it is coming up with a fault code saying its not working. What are the pros and cons of doing this?
I will be removing mine once ive had a look at the plate i need to knock up to replace the valve then get it coded out. the only con is that the cat will not get up to temp as quick but for mot the vehicle has to be warm anyways.
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