P0491 Diagnostic Trouble Code Discussion for June 2013
Secondary AIR System Insufficient Flow Detected (Bank 1)
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| Help Request | Posted | |
| 2004 BMW 545i 4.4L MIL Lamp on VIN: WBANB33564 P0491: Secondary air pump bank 1. Code coming after 2nd trip air pump works we check flow ok. Also flow air to heads |
June 27, 2013 | |
| 2004 BMW 545i 4.4L MIL Lamp on VIN: WBANB33564 P0491: Secondary air pump bank 1. Code coming after 2nd trip air pump works we check flow ok. Also flow air to heads |
June 29, 2013 |
