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P0491 Diagnostic Trouble Code Discussion for May 2010

Secondary AIR System Insufficient Flow Detected (Bank 1)


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Trouble Ticket Help Requests for DTC P0491
Help Request Posted
2004 BMW 325xi 2.5L MIL Lamp on
P0491: Secondary Air Injection bank 1. ... p0491 and p0492. Checked AIR pump, found that was burnt inside. easy enough, replaced the pump. 2 months later, the CEL back on, same codes. found pump bad again. OK, Warranty new pump. This time the pump didn't last for one day. OK, Warranty pump again. C...
May 17, 2010
2004 BMW 325xi 2.5L MIL Lamp on
P0491: Secondary Air Injection bank 1. ... p0491 and p0492. Checked AIR pump, found that was burnt inside. easy enough, replaced the pump. 2 months later, the CEL back on, same codes. found pump bad again. OK, Warranty new pump. This time the pump didn't last for one day. OK, Warranty pump again. C...
May 18, 2010
2004 BMW 325xi 2.5L MIL Lamp on
P0491: Secondary Air Injection bank 1. ... p0491 and p0492. Checked AIR pump, found that was burnt inside. easy enough, replaced the pump. 2 months later, the CEL back on, same codes. found pump bad again. OK, Warranty new pump. This time the pump didn't last for one day. OK, Warranty pump again. C...
May 17, 2010
2004 BMW 325xi 2.5L MIL Lamp on
P0491: Secondary Air Injection bank 1. ... p0491 and p0492. Checked AIR pump, found that was burnt inside. easy enough, replaced the pump. 2 months later, the CEL back on, same codes. found pump bad again. OK, Warranty new pump. This time the pump didn't last for one day. OK, Warranty pump again. C...
May 18, 2010