You could also have a bad coil or injector.. whenever I get a misfire code and I know I'm past due on plugs I replace the coil packs at the same time. I've never had to replace an injector

 

Lifter / cam

 

I would swap the number one coil with one from a different cylinder, clear the codes and drive it. If you get a light again see if it has moved to the cylinder you swapped with. If it does you have a bad coil, if it doesn't then it is a possible bad injector or cam. Good luck 👍

 

P0300 = Random Miss fire. P0301 = Miss fire on cylinder 1. There are a number of causes for a miss fire. While you could easter egg hunt it down, (you already did that and it cost you a set of plugs), It would be best to do some organized troubleshooting.

First, get your own scanner and get one that can clear DTC's. It's a tool and you'll likely use it enough to warrant the expense.
Second, with scanner in hand, clear all the codes (DTC's) and then drive the car normally for at least 25 miles and read the codes again.
Third, with a fresh set of codes, you can now begin the trouble shooting process.

Alternatively, take it to a Dodge dealer that is using wiTECT 2.0 and have them troubleshoot the car. This might save you a lot of headaches and money in the long run. That said, make sure you take it to one of the larger dealers with a good reputation. Some of the smaller dealers have good intentions but may not have the skillset to properly understand the wiTECH 2.0 troubleshooting process.

Hope you can resolve this with a minimum of pocket book pain.

 

P0300 = Random Miss fire. P0301 = Miss fire on cylinder 1. There are a number of causes for a miss fire. While you could easter egg hunt it down, (you already did that and it cost you a set of plugs), It would be best to do some organized troubleshooting.

A P0301 trouble code, for cylinder misfiring, can be caused by any of these problems:

Faulty spark plug
Faulty spark plug wire
Faulty coil pack
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Poor compression
Defective computer
Running out of fuel

 

First thing I would be checking is whether the electrical plug is fully engaged on the coil pack, or even injectors. I managed to not quite push one fully home and it gave intermittant faults until I found it.

 

How'd the spark plug look that came out of cylinder 1? Black carbon, white carbon, oily, fouled, damaged, normal?

 

Year, engine, mileage would all add a little info to help internet diagnose.

Is there any damage to the wires to the injectors? Rodent damage?

 

what engine Is this, the 3.6L, 5.7L, etc?

how many miles on the engine?

did the P0301 return with the new Check Engine Light or is it a different code?

 

Kind of an update but I did do the spark plugs but light was still on ever since I got my scheduled oil change the light has not been on which has been a month not sure if I should still get it checked even tho it seems to be driving good

 

The light will go out if the condition it was alerting to stops happening, so it sounds like the misfire stopped once the plugs got changed. That’s good.

The original code that turned the light on will still be stored even after the light is off though, so it wouldn’t hurt to have that cleared (or clear it yourself by disconnecting the battery for a few minutes). That way it is not mistaken for a new one should the light come back on at some point.

 

Sorry for the late reply I’m a full time student as well as have a full time job but the mechanics suggested getting a new engine. The car has been good no check engine light still but my check gas cap message popped up & I replaced it then it went away for a while & then came back could that be related to that misfire I had?

 

a loose or cracked gas cap shouldn't cause an engine misfire. It could lead to a Check Engine Light and P0456 code that would ultimately cause the car to fail a state inspection if still present when inspected, but I don't see that leading to an engine misfire in any plausible scenario.

 

Is it possible I have a leak? I replaced the gas cap & it just recently said to check the gas cap

 

It’s possible, sure. Do you ever smell gasoline when in or around the car? Especially after filling gas tank?

 

Possibly something in the charcoal canister system, but...

• I think that causes a different code
• I'm sure it would not cause a misfire

Edit: Based on a later code finding (follow thread), I am striking my error

 

Just got it scanned & I do have a leak but I have never smelled gasoline that’s the weird thing

 

what was the specific trouble code that showed up? P0456?

 

Yes that exact code!

 

Well, then it’s a good news/bad news situation.

Bad news: you will probably have to take to a shop and pay them to try to find the leak in your EVAP/fuel system. Any shop that has a smoke machine can hook it up and hopefully find the source of the leak. Then you can decide if you also want to pay them to fix it. If not, you’ll still be on the hook for some diagnostic time. Likely an hour or two.

Good news: I lied; there isn’t any good news. This type of problem can be very difficult to diagnose successfully, especially considering you don’t have a fuel odor to guide you to which part of the car is leaking fumes.

It would be better if you did smell fuel, that way you could concentrate your efforts on whichever part of the car smelled the strongest of gasoline. As it is, the leak could be literally anywhere in the car’s EVAP or fuel system right now.

That’s why one of those smoke machines can be so helpful. If the tech knows what he is doing and how to use it, the leak can potentially be identified pretty quickly, or several parts of the car can be ruled out as sources for the leak (if the smoke machine fails to find a leak).

One thing you can and should now is check your car’s VIN against Dodge’s Safety Recall website to see if there are any related, outstanding recalls for the car that need to be done.

There was a charcoal canister recall for some year Challengers, and until it’s performed, the affected cars may exhibit symptoms like the code you have.

It’s a long shot, but it’s free, so why not check just in case your car is due for a free fix?

 

I checked & the safety recall was complete but there’s an emissions recall that said incomplete could that be what you are talking about?

 

It depends on which recall it is. But I would advise taking the car to the nearest Dodge dealership and having the emissions recall service performed. It will be free of charge, and it certainly won't hurt this situation...just might help too!

 

Get the recall done and if you bought a generic Gas cap I would get an OEM one while at the dealer as well.

 

I will go in Saturday morning & update

 

Did the recall & then the next day which is today my check engine light came on got the code & it said it was
P0463(1 / 3) Stored

Fuel Level Sensor 1 Circuit High
Just wanted to know what is the part called I can’t seem to find anything on it

 

Given the additional information, the evap purge solenoid's discharge line enters the intake at/near cylinder no. 1. IF --- there is raw fuel coming from the evap canister due to topping off the gas tank, it could (in theory) cause an over rich condition at #1. That (again in theory) may result in a miss-fire.

 

Do you know how long it would take to fix that?

 

Pull your plugs from that cylinder and post pics. Pull number 3 as well and then swap them to the other cylinder.

 

I don’t work on my car I usually take it to a mechanic but I like to know everything before they try to tell me something different since they like to rip people off

 

Check engine light was gone today I read somewhere where it could be the ecm or pcm is the problem could that be the issue here?