Check Engine Light Due to Vacuum Leaks, Oxygen Sensor, or Catalytic Converter Fault on Audi Allroad Quattro

Vacuum leaks, oxygen sensor failure, and catalytic converter efficiency faults can cause the Check Engine Light to illuminate.

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Average mileage: 125,083 (50,000–200,000)
Exhaust & Emissions affected: 2.7L V6 Turbo
5 model years affected: 2001, 2002, 2003, 2004, more2005
20 people reported this problem
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Viewing 1 - 8 of 8 problem details
2003 Audi Allroad Quattro 200,000 mi,
It's saying both my secondary air injectors are failing and both my Catalytic converters are failing right now.
2001 Audi Allroad Quattro 125,000 mi,
Have a vacume leak that got worse tried to fiddle around an see exactly where it was coming from an broke the line completley now check engine light is on
2002 Audi Allroad Quattro 125,000 mi,
Oxygen sensor code keeps coming on and now it has the code for P0741 which is the transmission having to do with the torque converter.
2005 Audi Allroad Quattro 77,000 mi,
engine light on - dealership says it is a vaccuum seal issue. quote of $425 to fix
2003 Audi Allroad Quattro 110,000 mi,
replaced oxygen sensor
2002 Audi Allroad Quattro 50,000 mi,
Vacuum leak causing "check engine" alert
2002 Audi Allroad Quattro 141,000 mi,
P1131 o2 Sensor Bank2 Sensor 1 Internal Resistance too high