Code po301 misfire

2014 HONDA CIVIC
96,000 MILES • 4 CYL • 2WD
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JJP1062
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  • 17 POSTS
I replaced the coil and plug in cylinder one and still throws same code. What else could it be? No other codes present only po301.

Thanks!
Apr 26, 2022 at 7:53 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

The misfire, if it is only cylinder 1 can be caused by an injector issue, compression issue, or the new coil/plug isn't being fired.

Do me a favor. Follow the directions in this link and let me know if you are getting spark at the number 1 spark plug:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what you find.

Joe
Apr 26, 2022 at 2:06 PM
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JJP1062
  • MEMBER
  • 17 POSTS
Thank you! Faulty Injector. Solved
Apr 26, 2022 at 2:31 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

You are very welcome. I'm glad to know you found the issue.

Please feel free to come back anytime in the future. You are always welcome here.

Take care,

Joe
Apr 26, 2022 at 5:59 PM
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