Mastering the P0491 Challenge Essential Tips and Tricks

That's a secondary air pump code. Either the pump is bad or the check valves are bad or there is a leak in one of the hoses. If there is a ... Need to erase this codes for a 2010 Q5 3.2 FSI. Thanks in advance for your help. Attached Files .rar ... P0491 Secondary Air Injection System, Bank 1 - Insufficient Flow. P0492 Secondary Air Injection System, Bank 2 - Insufficient Flow. Discover what a P0491 code means for your Volkswagen and how to troubleshoot related Service Bulletins. Learn the causes, symptoms, ... The code it's showing is p0491: Secondary Air Injection System Insufficient Flow Bank 1. The thing is, I'm fairly certain that I do not have SAI. Secondary air injection is an emissions component on PZEV models that isn't related to engine operation - MAF not related at all. Electric air ... The dual codes indicate a system failure. A system failure can be due to one of the following: 1) Air pump failure - This is a fairly common ... My VW CC 2010 is having a CEL with the code P0491 which means the pressure sensor is not detecting enough air being pumped from the intake into the exhaust. I own a 2010 Bentley Supersport. here is the default code. P0491, what do you think of the secondary air circuit?? how can I identify the SAI 1 motor pump from ... The air injection pump is failing or the fuse has blown. It's a high-current fuse (40A if I recall). For troubleshooting, I would look from the load side of ...