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2012 Audi A4 2.0T Premium 4dr Avant Wagon Auto quattro

2012 Audi A4
Trim Info:
All-Wheel Drive, 4 Door Wagon, Small Station Wgn
21 (2011) mpg city / 27 (2011) mpg hwy
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June 25, 2011, 1:30 pm

Lynn K

Question: codes shown

p0300 p0301 p0302 p0303 shows missfire on 1234 cylinders. i replaced plugs & coil packs. what should gap on plugs be set at. also while engine is running it is very difficult to remove oil filler cap almost imposible when removed drastic change in engine sound

June 27, 2011, 3:37 pm

Ron W
Expert Mechanic

It sounds like you have a partial vacuum in your crankcase. Check the PCV system. The valve may be stuck closed...and could be the cause of the misfire problems as well.

As for the gap I'm not sure as I don't know what your engine size is, but if you contact almost any parts store, they should be able to provide that information.

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