CL-Class (W215) 2000-2006: CL 500, CL 600

Secondary air pump

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Old 10-19-2019, 01:47 PM
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2007 S550 & 2009 CL63 AMG & 2009 BMW 328i Convertible
Secondary air pump

I have an error code (Secondary air pump) I know the pump is not the problem. I have a new one. I also hear when the fan in the pump turns on. When I had a hose in the front replaced, the mechanic told me he had to change some rotted lines to the air pump. Now this happens when its cold out. I heard there is some valve that goes bad over time. Does anyone know anything about that?
Old 10-19-2019, 05:41 PM
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1999 E300TD
Go back to your mechanic with the problem, he surely knows the elements of the system and has the diagnostics to help!

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