P0491 CODE help
08-28-2019, 07:43 AM
#1
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P0491 CODE help
Hey all, 2015 Q7, CODE P0491 Secondary Air Injection System, Insufficient flow Bank 1
Anyone else have this issue, and what to look for. Possible air pump, solenoid valve, or Combi valve, or vacuum lines
Thanks
Anyone else have this issue, and what to look for. Possible air pump, solenoid valve, or Combi valve, or vacuum lines
Thanks
08-28-2019, 09:32 AM
#2
AudiWorld Super User
Diesel? US? Fixed? If yes to all, thats an emissions component and covered by #dieselgate warranty.
08-28-2019, 11:19 AM
#4
AudiWorld Super User
VR6, yeah those SAI's are notorious for going out.. yeh gotta just replace the pump 99% of the time..
P* codes are generic, get it plugged into a real VAG specific code reader to ensure its not a red herring.
P* codes are generic, get it plugged into a real VAG specific code reader to ensure its not a red herring.
08-28-2019, 11:21 AM
#6
AudiWorld Super User
https://obdeleven.com/en/
If you cant afford an Audi Tech, then that or a more expensive VCDS is going to be pretty much required for you to work on your own vehicle.
If you cant afford an Audi Tech, then that or a more expensive VCDS is going to be pretty much required for you to work on your own vehicle.
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