A4

2003 Audi Quattro

Tiny

Nathaniel Malast

August, 5, 2011 AT 10:28 PM

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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5 Answers

Tiny

rasmataz

August, 5, 2011 AT 10:33 PM

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.

Tiny

Nathaniel Malast

August, 5, 2011 AT 10:46 PM

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

Tiny

rasmataz

August, 5, 2011 AT 10:47 PM

Have the catalytic converter checked-

Tiny

Nathaniel Malast

August, 5, 2011 AT 10:50 PM

Could this be normal, the car is running great?

Tiny

rasmataz

August, 5, 2011 AT 10:54 PM

P0420 - Catalyst System Efficiency Below Threshold (Bank 1)

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