P0491 Diagnostic Trouble Code Discussion for March 2012
Secondary AIR System Insufficient Flow Detected (Bank 1)
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| Help Request | Posted | |
| 2005 BMW 330xi 3.0L MIL Lamp on VIN: WBAEW53435 P0491: Secondary air flow bank1. ... right front and the air pump was replaced. Codes P0491 and P0492 keep coming back when cleared. I checked the pump when engine was cold and it comes on and has a good air flow. The pump line leads to a vacume contol valve whi... |
March 15, 2012 | |
| 2005 BMW 330xi 3.0L MIL Lamp on VIN: WBAEW53435 P0491: Secondary air flow bank1. ... right front and the air pump was replaced. Codes P0491 and P0492 keep coming back when cleared. I checked the pump when engine was cold and it comes on and has a good air flow. The pump line leads to a vacume contol valve whi... |
March 15, 2012 |
