× 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
2010 Audi A5 Quattro 2.0L MIL Lamp on
Posted to European Driveability on 2/28/2017 20 Replies

The car came in with a P0420 and P0456 catalyst and very small evap leak. We did all the normal testing to make sure the cat was bad and then replaced the cat with a DEC part. The light came back on 2 days later. Has anyone had a bad DEC cat? What else could b...

20 Replies Received (View Replies)

  Related Documents & Media  2010 Audi A5 Quattro

 
Message Closed w/FIX

car Vehicle Data

2010 Audi A5 Quattro

VIN WAULFAFR7A
Engine2.0 L / 4 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAfter 1 Day

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed w/FIX

car Vehicle Data

2010 Audi A5 Quattro

VIN WAULFAFR7A
Engine2.0 L / 4 cyl / GAS
Trans6-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAfter 1 Day

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)