P0491 Diagnostic Trouble Code Discussion for September 2014
Secondary AIR System Insufficient Flow Detected (Bank 1)
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| Help Request | Posted | |
| 2004 BMW 545i 4.4L MIL Lamp on VIN: WBANB335X4 P0491: secondary air system insufficient flow bank 1. ... in with codes p0491 and p0492 and we found the air pump seized. replaced the air pump. cleared codes and after about 100 miles check engine light back on with same codes. verified that the fuse was not blown and the relay is good. have activated system wit... |
September 11, 2014 | |
| 2004 BMW 545i 4.4L MIL Lamp on VIN: WBANB335X4 P0491: secondary air system insufficient flow bank 1. ... in with codes p0491 and p0492 and we found the air pump seized. replaced the air pump. cleared codes and after about 100 miles check engine light back on with same codes. verified that the fuse was not blown and the relay is good. have activated system wit... |
September 13, 2014 |
