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2000 Audi A6 Quattro 2.8L MIL Lamp on
Have tested O2 sensors , all seem to read normal. Back sensors flat line and front sensors have great cross counts and voltages. Replaced the air pump, the motor was shorted. The MIL still comes on with the same codes, P0431 and P0421. I tested the seconday ai...
Summary posted 1/5/2004
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Related Documents & Media | VIN | WAUEH54B1Y |
| Engine | 2.8 L / 6 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0421 | Catalytic Converter Efficiency (Bank 1) |
| P0431 | Catalyst Efficiency Below Normal (Bank 2) |
Message Closed w/Summary
Vehicle Data
2000 Audi A6 Quattro
| VIN | WAUEH54B1Y |
| Engine | 2.8 L / 6 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0421 | Catalytic Converter Efficiency (Bank 1) |
| P0431 | Catalyst Efficiency Below Normal (Bank 2) |
Video