ML350 Misfire

Homer Hernandez • 12 February 2020
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I have 2015 Ml350 with 54,000 miles that has random miss fire on cylinder 3 with code P030385.

When I take vehicle to dealership they say they do not see any codes and cannot replicate.

54,000

Hi Homer

The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring.

P0303 - MERCEDES-BENZ Possible Causes: Faulty spark plug 3, Clogged or faulty fuel injector 3, Faulty ignition coil 3, Fuel injector 3 harness is open or shorted, Fuel injector 3 circuit poor electrical connection, Ignition coil 3 harness is open or shorted, Ignition coil 3 circuit poor electrical connection, Insufficient cylinder 3 compression, Incorrect fuel pressure Intake air leak.

Have a great day, hope this will help you.

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