2000 Audi A6 6 cyl All Wheel Drive Automatic 141, 00 miles
Getting Check Engine Light CEL with code DTC P0421. All my internet research yields a concensus that the catalytic converter on the passenger side of the vehicle is bad.
I find this difficult if not impossible to believe. I have owned several vehicles with bad cats, and this vehicle exhibits non of the symptoms of that problem (i.E, choked performance, high emissions). Also, on researching this 2.7T APB engine, I see that several years and models with this engine were covered under an Audi Technical Service Bulletin, (but a 2000 A6 is not mentioned) that instruct the dealer to 'flash' the computer ECU with higher tolerances on the range of some measurement of cat performance. Would you please weigh in on this and let me know of the real problem? Thanks!
have the same problem?
Tuesday, August 18th, 2009 AT 6:41 PM