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Steve, BMW Expert
Category: BMW
Satisfied Customers: 23872
Experience:  BMW Expert
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P0492 and 1 in my 745

Customer Question

p0492 and 1 in my 745 LI
Submitted: 1 year ago.
Category: BMW
Expert:  Steve replied 1 year ago.
What has been checked so far?
Customer: replied 1 year ago.
Expert:  Steve replied 1 year ago.
I will provide an honest answer. I trust this will be appreciated. Please remember that a low rating PUNISHES me for being honest and that I receive nothing for my time until a positive rating is clicked.
these codes are generic codes for a problem with the secondary air injection system
these codes, as they are generic, can be caused by many things. The most common on this model is the air passages becoming clogged with carbon, fixing this requires the carbon be cleaned out.
other possibilities are a bad air pump, bad air pump power supply, faulty hoses or valves.
all of the above will need to be checked by a professional, but the carbon build up is likely as the cause on this model
Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.

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