Engine code P0305

[Tomahawk18]

2019 Rubicon threw a code yesterday P0305, (5th cylinder misfire). Anyone else dealt with this? Thoughts? Seems like the first step would be a new spark plug and check the if the wiring is tight. What is the best and worst case here? Thanks,

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[mwilk012]

What are your symptoms?
Does your exhaust have a pronounced fuel smell?
How many miles on the vehicle?
Unless it’s extremely low mileage, spark plugs don’t just fail for no reason. Ignition coils and fuel injectors do.
I would check the wiring for rodent damage also. You never know.

 

[jaymz]

Best case scenario is something got wet.

Worst case scenario is you have a bad valve.

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