Unleashing the Potential P0491 Decoded for Professionals

Possible Causes · Fuse or relay for Secondary Air Injection Pump faulty · Hose(s)/Piping between Secondary Air Injection Pump and Combi (Secondary Air Injection) ... This code comes back and I have to remove it to turn off the check engine light. I have been told I need a carbon cleaning and Audi will not honor an extended ... Need to erase this codes for a 2010 Q5 3.2 FSI. Thanks in advance for your help. Attached Files .rar ... 2002 530i e39 - P0491 & P0492 Secondary Air Injection System (Bank 1 & 2) Emission rejected due to codes P0491 & P0492. P0491 and P0410 Codes Secondary Air Injection System ... Background on the car... 2007 Fusion w/ roughly 54k on the clock....no issues with the ... I bought this for my 2003 E46 BMW 325xi to fix the check engine light for code P0491 and P0492 which showed an error on the secondary air injection. Diagnose ... The error codes were a result of a bad combi-valve (which is similiar to an egr valve). Had to install parts 022-131-101-B (valve) & 078-131-120-K (gasket). Hi guys, Can anyone help with fault code P0491 and P0492 as in how to fix ? Air injection errors usually point towards vacuum leak or a blockage. Vacuum leaks can be identified with a smoke tester and sometimes, build up in carbon can ... The OBD-II fault code P0491 means that the Secondary Air Injection System is not providing enough airflow into the exhaust system during ...