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P0491 Diagnostic Trouble Code Discussion for June 2013

Secondary AIR System Insufficient Flow Detected (Bank 1)


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Trouble Ticket Help Requests for DTC P0491
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
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