Hey everyone, I have the code P0306 on my 2012 Dodge Journey SXT with the V6 engine. I have replaced the ignition coil and spark plug on cylinder 6 and this issue still persists. My car doesn't idle bad, being pretty smooth, but I have noticed when I am going 1-2kmh before stopping that the car goes back and forth pretty violently, other than that it drives really smooth. Any idea as to what this issue can be and what can be done moving forward? Thanks!

 

So drivers side rear you replaced the plug and coil? Should've done the other 2 after going to that much work. Did you replace the upper intake seals, lowers would've been worth while while in there also. What did the old plug look like?

 

I did the driver side front and the one beside it as well. Wasn't too hard to remove so I don't mind doing it again. Didn't replace the seals but they seemed fine, might order anyways and replace them just to be sure. Old plug was pretty good, just some wear on it due to being used but was sparking perfectly fine. Also checked the plug beside cylinder 6 and they looked the exact same.

 

Cylinder #6 is drivers side bank rear, so that could still be your issue. I just suggest doing them all because packed under the intake they can tend to collect more heat, and odds of failure increase. I agree its not a terrible job, but in the event of this such as a misfire and troubleshooting its nice to just say they were all done. Nothing worse then firing it up and still having the issue. The worst of the job is that nut on the passenger rear bracket, which i somehow managed to drop and didn't bother looking for.... There's also the possibility the ECU isn't correctly recognizing the misfire, it may say #6 but could potentially be another cylinder affecting it.

The seals if squishy are probably ok, its just another one of those, could cause and issue especially on reassembly. The lower is here nor there. Its just the, its apart and you have a misfire, take care of all possibilities. If you did replace the lowers, I would give the oil cooler a good looking over as well since its the easiest you'll ever be able to see it.

 

Will do so and give an update once done!

 

Hey, so didnt do the oil cooler but decided to add some fuel injector cleaner. I rescanned the codes using my obd2 scanner and the code went from permanent to pending. It went back to permanent after I cleared the code then back to pending again after I drove it a little far. Could this be a sign that it's a faulty fuel injector?

 

I don't under stand the logic of every scanner, and I'm unaware what style your using. Permanent to me would me the test cycle for that code has happened and failed, pending means the test hasn't run but conditions are present for the fault to be valid.