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2000 Audi A4 2.8L MIL Lamp on
We have four scan tools in the shop and cannot monitor both oxygen sensors to test cat, efficiency. I suspect that both cats are bad but hesitate to replace them and have a repeat failure. Does anyone have advice about what the cause might be or is this a comm...
FIX posted 10/26/2006
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Message Closed w/FIX
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13 Replies Received
Related Documents & Media | VIN | WAUDH28DOY |
| Engine | 2.8 L / 6 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Several Days |
| Misc. | Quattro |
Trouble Codes
| P0421 | Catalytic Converter Efficiency (Bank 1) |
| P0431 | Catalyst Efficiency Below Normal (Bank 2) |
Message Closed w/FIX
Vehicle Data
2000 Audi A4
| VIN | WAUDH28DOY |
| Engine | 2.8 L / 6 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Several Days |
| Misc. | Quattro |
Trouble Codes
| P0421 | Catalytic Converter Efficiency (Bank 1) |
| P0431 | Catalyst Efficiency Below Normal (Bank 2) |
Video