AUDI A4 QUATTRO

  • Tiny
  • Nathaniel Malast
  • 2003 Audi Quattro
  • V8
  • AWD
  • automatic
  • 89,321 miles

I have a 2003 audi quattro, is running great, I changed the oil and filter, car is still running great as ever then check engine light came on even though no apparent problems, took it to be read they said catalytic converter? Could this be, thanks, Nathan

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Friday, August 5th, 2011 AT 10:28 PM

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  • Tiny
  • rasmataz
  • Member

Go to this link: http://www.2carpros.com/articles/service-engine-soon-or-check-engine-light-on-or-flashing

Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.

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Friday, August 5th, 2011 AT 10:33 PM
  • Tiny
  • Nathaniel Malast
  • Member

Srry, forgot to add this. Code was read as P0420?

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Friday, August 5th, 2011 AT 10:46 PM
  • Tiny
  • rasmataz
  • Member

Have the catalytic converter checked-

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Friday, August 5th, 2011 AT 10:47 PM
  • Tiny
  • Nathaniel Malast
  • Member

Could this be normal, the car is running great?

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Friday, August 5th, 2011 AT 10:50 PM
  • Tiny
  • rasmataz
  • Member

P0420 - Catalyst System Efficiency Below Threshold (Bank 1)

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Friday, August 5th, 2011 AT 10:54 PM

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