Question about 2007 BMW M6 Coupe
DSC malfunction and DBC malfunction, startoff assistance inactive just started showing up but no fault codes can be found
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Posted on Jan 02, 2017
Good evening Daniel,
Congrats on replacing the head gasket successfully! In regards to your secondary air system. I would first start with the electrical air pump supply located on the passengers side of the engine compartment. You can locate the supply hose (about 1 1/2 inch diameter) at the front of the exhaust manifold. The hose connects to the secondary air valve. Make sure the hose is connected. Also make sure if there is a vacuum supply line to the secondary air valve, that it is not broken/or disconnected. If the hoses are ok and secure, then remove the larger supply hose from the valve when the engine has not been started for 4-5 hrs and make sure you have air flow from the air pump. The pump should be audible and operate for approximately 30seconds to a minute. If you are still having issues after these checks, I can list other possible causes.
Posted on May 05, 2011
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