OBD CODE P0422 AND PO304 on 2000 Volkswagen Jetta

I JUST GOT A DIAGNOSTIC REPORT FOR OBD PO422 INDICATING PROBABLE CAUSES, RICH AIR /FUEL RATIO ,AIR LEAK NEAR REAR HO2S > OR FAULTY FUEL CONTROL HO2S = HEATED OXYGEN SENSOR WHAT DOES THAT MEAN AND CODE PO304 WHICH INDICATES CYLINDER 4 MISFIRE IGNITION SYSTEM FAULT ,FUEL INJECTOR FAULT SO WHAT DOES ALL THAT MEAN AND HOW MUCH WILL IT COST ME?

by in Staten Island, NY on May 27, 2011
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1 answer
ANSWER by , May 27, 2011
Hi, I knew a VW professional tool, which is U281, and it can read and erase trouble code in VW car. it is cheaper and you can DIY.