Question about 2003 Volkswagen Passat
This code indicates that you have a faulty secondary air injection system. Basically this is a system in which pumped air is allowed into the exhaust system to help burn off any residual fuel droplets when the engine is warming up and thereby reduce hydrocarbon emissions. The 'injection of air' (opening of the valve) is by vacuum supplied by a thermally resistant over-braided vacuum line. Find your combi 'air injection' valve on the exhaust manifold and then check the integrity of the length of over-braided vacuum line. There is a good chance that the fault is merely a leak in this line (a poor end fitting) and this in turn is failing to supply the necessary vacuum to open the valve to allow pumped air into the exhaust. Hope this helps point you in the right direction.
Posted on Jan 01, 2011
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Posted on Jan 02, 2017
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