P0491 Uncover the Hidden Causes and Effective Solutions

If you're seeing this code, it means the powertrain control module (PCM) has identified that the SAI system is dealing with insufficient flow. The tube running from your intake elbow goes to the secondary air pump. What tends to happen is it splits somewhere or the attached sensor goes bad and codes ... In this video, I will show you how to fix BMW the air injection codes p0491 and P0492. P0492: Secondary Air Injection System Insufficient ... I have the infamous code P0491, and have been troubleshooting the secondary air pump system on my 02 M5. Took the cover off and verified the ... Q7 MK 1 Discussion - P0491 CODE help - Hey all, 2015 Q7, CODE P0491 Secondary Air Injection System, Insufficient flow Bank 1 Anyone else ... I have Codes P0491 and P0492 coming up for my 04 V8. Now I know that both are for the secondary air system bank 1 and 2 but how do I pin point the problem my ... Secondary Air Injection System Insufficient Flow Bank 1. DTC P0491, sometimes indicated as P049100, is an OBD diagnostic trouble code indicating a generic fault ... SEL: P0491 Secondary Air Injection System Insufficient Flow General BMW Z4 Forum. 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 ... S-Type / S type R Supercharged V8 ( X200 ) - P0491...secondary air pump? - I just scanned my car for a CEL and came up with this code.