2000 Audi A4 Quattro 2.8L MIL Lamp on
Hello Group!!! This Audi has recurring codes P0421 and P0431. These are low cat eff. both sides. The system will go into readiness but the codes will return eventually. Before I go and replace cats and/or monitoring O2s I was wondering if anyone has seen this ...
FIX posted 4/1/2004
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Vehicle Data2000 Audi A4 Quattro
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Message Closed w/FIX
Vehicle Data
2000 Audi A4 Quattro
VIN | WAUDH28D5Y |
Engine | 2.8 L / 6 cyl / GAS |
Trans | 5-speed Automatic (Electronic) |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Intermittently |