P0411 Diagnostic Trouble Code Discussion for July 2009
Secondary AIR System Incorrect Airflow Detected
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| Help Request | Posted | |
| 2000 Audi A4 Quattro 1.8L MIL Lamp on VIN: WAUDC28D1Y P0411: secondary air injection incorrect flow. I have read a bunch of post about broken vacuum hoses, bad valves, pumps, hoses. These all check good. Here's what happens. If you let the basic setting test run it will usally, 85% of the time fail, the reading will be about 1.5g/s. If you disconnect the vacu... |
July 08, 2009 | |
| 2000 Audi A4 Quattro 1.8L MIL Lamp on VIN: WAUDC28D1Y P0411: secondary air injection incorrect flow. I have read a bunch of post about broken vacuum hoses, bad valves, pumps, hoses. These all check good. Here's what happens. If you let the basic setting test run it will usally, 85% of the time fail, the reading will be about 1.5g/s. If you disconnect the vacu... |
July 09, 2009 |
