What does Engine code p0304 mean?

+1 vote
asked Nov 15, 2018 in Repairs/Maintenance by KerryStickle (220 points)
What does Engine code p0304 mean?

1 Answer

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answered Nov 15, 2018 by Essmann (42,860 points)
The engine diagnostic code P0304 means that your engines number 4 cylinder is not firing properly and has a misfire which could be caused by bad ignition coil, bad spark plug, bad spark plug wires, or even a problem with the fuel system.

The cylinder could be losing compression as well but it's hard to say exactly what is causing it without putting the vehicle through a better diagnostic test.

A regular auto shop should have the equipment to run a complete diagnostic test although it might cost you some money for the test but is well worth it to pinpoint exactly what the cause of your cylinder 8 misfire is.

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