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1999 BMW 540i 4.4L MIL Lamp on
Customer complains the SEL light came on recently, Has DTC – P0491, P0492 for B1 and B2 secondary air system failure. Freeze frame – 680 RPM 100f, 0MPH, 2.7% load, LTFT 1 +9.4%, LTFT 2 +5.5%, STFT 1 -8.6%, STFT 2 -8.6%. Suspect Probable secondary air pump fail...
FIX posted 11/15/2006
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Message Closed
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6 Replies Received
6 Replies Received
Related Documents & Media | VIN | WBADN6346X |
| Engine | 4.4 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0491 | AIR System Performance |
| P0492 | B2 secondary air system failure |
Message Closed
Vehicle Data
1999 BMW 540i
| VIN | WBADN6346X |
| Engine | 4.4 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0491 | AIR System Performance |
| P0492 | B2 secondary air system failure |
Video