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Jerry, Master Mechanic
Category: Dodge
Satisfied Customers: 1754
Experience:  ASE Master tech, 30 years exp. troubleshooter, driveability tech
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I am getting the trouble codes P0300 and P0304 -- random

Customer Question

I am getting the trouble codes P0300 and P0304 -- random cylinder and #4 cylinder misfiring. I recently (two weeks ago) changed the camshaft sensor AND crankshaft sensor but these codes have reappeared. What are your thoughts on the next possible problem?
It will have the problem but then sometimes run very well and then randomly start to act up again.
Submitted: 2 years ago.
Category: Dodge
Expert:  I. Silva replied 2 years ago.
Hello...welcome and thank you for using justanswer.
The trouble code P0304 can be caused by bad ignition coil ,spark plug wire or a bad spark plug itself ,I would check and replace if needed.
The P0300 can be related to the first code ,I would fix the misfiring on cylinder number 4 first.
Good luck.
let me know.
Thank you.
Customer: replied 2 years ago.
If it had a bad ignition coil would it have a separate trouble code? How would you suggest I fix the #4 cylinder misfire?
Expert:  I. Silva replied 2 years ago.
No . the code P0304 is for cylinder n4 misfiring ,like I said ,you will need to check the condition of the spark plug on that cylinder ,check for white spots(burned) on the spark plug wire and also check if spark comes out if the cylinder number four tower on the ignition coil pack.
If you don't find anything wrong ,the next step would be checking for compression on that cylinder and if good ...check for pulse at the number 4 fuel injector ,replace it if needed.
Good luck.
Please rate my answer if I have helped ,ask for additional info if needed.
let me know.
Thank you.