× 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 January 2021

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 Volkswagen Passat GLX 4 Motion 2.8L MIL Lamp on, P0491, p0492 VIN: WWWTH63B52
P0491: Secondary Air Injection-Bank1. The problem here is the MIL light being on due to Secondary Air Injection Issue to bank 1 and 2. The MIL light comes on when all monitors are set except the Secondary Air Injection, which says the test was ABORTED.
January 17, 2021