2000 Audi S4 Question manufacturing fuel air metering

2000 AUDI S4
80,000 MILES • 6 CYL • AWD • MANUAL
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STEVEN ROMANN
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My check engine light has been on for a while. Several mechanics could not figure out the problem. No noise or problem except it did not pass CT emissions testing. Where do I start?
Dec 4, 2009 at 9:58 PM
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MHPAUTOS
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Hi there, if the check light is on there should be a set fault code stored in the ECU, a scan will read this code and the code will give you a starting point for the diagnostics.

mark (mhpautos)
Dec 4, 2009 at 10:07 PM