2005 c230k- codes p0455, p0456 and p0303

Asked by teanytut Dec 10, 2014 at 12:44 AM about the 2005 Mercedes-Benz C-Class C 230 Kompressor Supercharged Sedan

Question type: Maintenance & Repair

CEL on - smog test failed with above referenced codes- not sure how major this may be-
CEL remained on for a few days until I filled gas tank believing I may have previously
rec'd tainted gasoline- CEL actually went off until I went on highway and accelerated at
which time CEL came on again- car sputtered so I pulled over and shut off car. Re-started
with no problems except CEL on again

FordNut answered 9 years ago

http://engine-codes.com/p0455_mercedes-benz.html The first two, P0455 and P0456 are EVAP, possibly leaks. maybe gas cap. See that site for more details. Now P0303 is a different story, misfire on #3 cylinder. Bad spark plug, coil, injector. For more information for that see http://engine-codes.com/p0303_mercedes-benz.html

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CEL on - smog test failed with above referenced codes- not sure how major this may be- CEL remained on for a few days until I filled gas tank believing I may have previously rec'd tainted gasoline- ...

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2005 c230k- codes p0455, p0456 and p0303

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