× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0491 Diagnostic Trouble Code Discussion for September 2005

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
1999 BMW 750iL 5.4L MIL Lamp on VIN: WBAGJ0336X
P0491: ECU error. BMW experts. This car came in with the above code. Customer says no driveability issues. I could not find any description of this code in Alldata or on this network. Does anyone know about this code and what the correction would be? Thanks for any help.
September 30, 2005