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Secondary Air Injection Fault Code


camfambmw540
02-26-2003, 12:58 PM
Car = 99' bmw 540i
I just got a new check engine problem, OBD II shows P0491 and P0492 which are Secondary Air Injection System Bank 1 and 2.

Does anyone know what this is and what I should do??

Any help would be appreciated.

Thanks to all
paulauma
05-30-2003, 08:54 PM
The secondary air injection pump is an emissions control device. It is the round part near the passanger side of the car with a hose connected to it from the front of the car. It pumps air into the exhaust manifold. It has a filter piece on the top of it. Maybe it's clogged.:devil:

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