What do these codes mean?
On my 2002 A8 I have the following codes 491, 492. I cleared the codes and so far so good. I know I have a bad drivers side cat converter. Would this cause these codes.
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Those aren't fault codes. A fault code would be P0300 or 16684 which is the DTC number for the same code.
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P0491: Secondary Air Injection System Insufficient Flow Bank 1
P0492: Secondary Air Injection System Insufficient Flow Bank 2 |
Future reference: http://www.aboutautomobile.com/DTC/
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Originally Posted by Midniteoyl
(Post 1099701)
P0491: Secondary Air Injection System Insufficient Flow Bank 1
P0492: Secondary Air Injection System Insufficient Flow Bank 2 |
Its minor, the secondary air injection system injects air into the exhaust to help heat up the cats upon cold start. Thats all it does. It won't affect engine performance in the least, so fixing it doesn't have to be done right away.
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Originally Posted by auditech79
(Post 1100184)
Its minor, the secondary air injection system injects air into the exhaust to help heat up the cats upon cold start. Thats all it does. It won't affect engine performance in the least, so fixing it doesn't have to be done right away.
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