Srobbins11 Posted January 14, 2023 Report Share Posted January 14, 2023 I have a 2013 Dodge Journey Crew 3.6. We have been through the ringer and looking for advice. I had the following codes P0128, P0171, P0300, P0303, P0131, and P0172. We have done an oil change, air filter, replaced thermostat, spark plugs, coil packs and replaced 4 o2 sensors. Ran great for 2 days. Now we have P0304 cylinder 4 misfire. Thoughts or next steps? Quote Link to comment Share on other sites More sharing options...
John/Horace Posted January 14, 2023 Report Share Posted January 14, 2023 Welcome to the site. I hope you didn’t do that in one visit. How many miles on the vehicle.? Reset the code and see if it comes back. If work was done by a shop, bring it back. Some parts can fail right out of the box, China could have had a bad day. Bad coil or plug on cylinder 4. Were new gaskets used on the plastic intake manifold when changing rear plugs. Gaskets can compress, reusing not always the better option. Extra air into cylinder can cause misfire. Along with a lot of other things. Quote Link to comment Share on other sites More sharing options...
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