P0491 Diagnostic Trouble Code Discussion for October 2012
Secondary AIR System Insufficient Flow Detected (Bank 1)
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Trouble Ticket Help Requests for DTC P0491
| Help Request | Posted | |
| 2002 Audi A6 Quattro 2.7L MIL Lamp on VIN: WAULD64B52 P0491: secondary air injection system insufficient flow B1. ... the only thing I found leak was the hose splitting from the secondary air injection going to the right combi-valve had a crack and both combi-valve leak. These three thing I will be replacing, but would you guys suggest any other things that would cause th... |
October 09, 2012 |
