P0491 Diagnostic Trouble Code Discussion for May 2010
Secondary AIR System Insufficient Flow Detected (Bank 1)
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| 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 |
