The Audi A4 B7 was manufactured in Germany from 2004-2008 and built on the Volkswagen Group B7 (PL46) platform. German import fans admired the sedans, wagons and Cabriolets as sleek and stylish. This vehicle, which was released in 5-speed, 6-speed and 7-speed transmissions, earned a good deal of praise. Unfortunately, like any new vehicle, this compact executive car developed a few common malfunctions, including PCV failure.
Signs of a positive crankcase ventilation failure can include misfire during idle, a small decrease in gas mileage or boost pressure, or a slight oil leak from the filler cap onto the coil packs or the bottom of the engine cover. Alternately, oil might gather by the diverter valve. This system can fail in a variety of ways, including sticking open due to debris.
In event of PCV failure, gas is unable to be vented from the crankcase to the intake manifold. Rather, it returns to the crankcase. Proper negative pressure is important for the health of your engine.
As with any engine-related issue, we recommend consulting an independent Audi service expert. They will be able to provide an affordable yet expert solution. The increased costs which can accompany progressed or resultant engine damage are not worth the risks associated with an untrained owner’s diagnostic and repair efforts. Whether a driver suspects issues because of something he has noticed or is concerned about a vehicle’s high mileage and increased risks, these professionals have the specialized tools and experience to best to troubleshoot and repair your German import.
Search for a local, independent Audi repair shop with Audi mechanics that have dealer-level expertise at a fraction of the expense.