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Old 03-22-2018, 09:12 AM
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Rough Idle, Check Engine, Ethanol

First time poster here

Did a search and I think I have the answer to my problem, but let me know what you guys think.

I have a 2013 Sport that started idling rough this morning. Check engine light was on and kept flashing/beeping while driving. After driving a few miles to work, the idle got a little smoother but not completely better.

Yesterday morning I filled up the tank with with E10 for the first time and didn't think much of it. Didn't run into any issues throughout the day, but now have this rough idle problem approximately 24 hrs after filling up. I'm thinking this is due to the E10 gas rather than using regular unleaded. Thoughts?

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Old 03-22-2018, 09:25 AM   #2
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All of North America uses E10. Regular Unleaded *is* E10. Do you mean E85?

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Old 03-22-2018, 09:27 AM   #3
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E10 is all I can get in my area and I haven't had any issues in over 8 yrs. What you could have is excess moisture in the service station underground tanks. Water in the gas can cause this problem. The first thing to do is to check to see what codes are present. Any chain auto parts store will read it at no cost.
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Old 03-22-2018, 09:37 AM   #4
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Also, how cold was it outside when this happened?
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Old 03-22-2018, 09:45 AM
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All of North America uses E10. Regular Unleaded *is* E10. Do you mean E85?
Whoops- clearly I lack a good understanding of ethanol/gas in general. The pump was labeled E10 and I guess I’ve never seen it before so I assumed it was something different.

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E10 is all I can get in my area and I haven't had any issues in over 8 yrs. What you could have is excess moisture in the service station underground tanks. Water in the gas can cause this problem. The first thing to do is to check to see what codes are present. Any chain auto parts store will read it at no cost.
I think that’ll be the next thing I do

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Also, how cold was it outside when this happened?
It was in the low 30’s yesterday, so definitely not very cold by Minnesota standards.
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Old 03-22-2018, 09:53 AM   #6
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You might be able to get the dash to read out the code for you by jiggling the ignition between off and ACC 5 or 6 times, without going to Autozone. Neat trick. But it will only work if the light is still active.

And are you sure it was the Check Engine light and not the Electronic Throttle Control light?
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Old 03-22-2018, 04:25 PM   #7
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might be water in the gas. Get some fuel stabilizer (red stuff). hopefully it did not take out your spark plugs.
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Old 03-22-2018, 06:07 PM
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You might be able to get the dash to read out the code for you by jiggling the ignition between off and ACC 5 or 6 times, without going to Autozone. Neat trick. But it will only work if the light is still active.

And are you sure it was the Check Engine light and not the Electronic Throttle Control light?
It’s defintely the CEL. Did this trick and got code P 0305: Cylinder # 5 Misfire
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Old 03-22-2018, 06:18 PM   #9
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If it's water in the gas, you can try STP Water Treatment or Iso-Heet.

If it's a bad spark plug you can try changing it of course.

I would also try Techron Fuel Injector Cleaner (or a Complete Fuel System Cleaner).

Otherwise this problem is beyond my abilities to diagnose and fix.

If the Check Engine Light is blinking it means you gotta take it to service ASAP.

Found this:

https://mobiloil.com/en/article/car-...sis-and-repair
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Old 03-22-2018, 06:22 PM
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Also got code P2314 Ignition Coil Secondary # 5 Circuit so sounds like bad coil on cylinder 5
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Old 03-22-2018, 06:33 PM   #11
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Also got code P2314 Ignition Coil Secondary # 5 Circuit so sounds like bad coil on cylinder 5
It's nice that it's that specific because now you know exactly what to do.
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Old 04-02-2018, 12:44 PM
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Update: replaced the spark plug and ignition coil for the #5 cylinder which fixed my issue for about a week. Then the CEL came back on and had same P2314 "Ignition Coil Secondary # 5 Circuit Insufficient Ionization" issue. Took it to the dealer this morning and they said the issue is with the engine wiring harness. They quoted me about 800-1000 to repair or 1500 to replace since it's not covered under the powertrain warranty.
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Old 04-02-2018, 04:42 PM   #13
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Update: replaced the spark plug and ignition coil for the #5 cylinder which fixed my issue for about a week. Then the CEL came back on and had same P2314 "Ignition Coil Secondary # 5 Circuit Insufficient Ionization" issue. Took it to the dealer this morning and they said the issue is with the engine wiring harness. They quoted me about 800-1000 to repair or 1500 to replace since it's not covered under the powertrain warranty.
your close to your 5 years being a 2013. when did you buy it? how many KM on the engine? Call corporate about that.....
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Old 04-02-2018, 04:47 PM   #14
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https://www.autocodes.com/p2314_dodge.html

After you repaired it yourself was it still running rough? have you tried some dielectric grease?

https://fortnine.ca/en/permatex-diel...0187&555=10173
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Old 04-02-2018, 06:52 PM
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Update: replaced the spark plug and ignition coil for the #5 cylinder which fixed my issue for about a week. Then the CEL came back on and had same P2314 "Ignition Coil Secondary # 5 Circuit Insufficient Ionization" issue. Took it to the dealer this morning and they said the issue is with the engine wiring harness. They quoted me about 800-1000 to repair or 1500 to replace since it's not covered under the powertrain warranty.
your close to your 5 years being a 2013. when did you buy it? how many KM on the engine? Call corporate about that.....
I bought it in December 2017 so I’m the 2nd owner. Bought it with about 55k on it and put about 5k on myself now.

I dont have any experience with Jeep corporate. You think they would do something in this scenario or maybe not since I’m not the original owner?

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https://www.autocodes.com/p2314_dodge.html

After you repaired it yourself was it still running rough? have you tried some dielectric grease?

https://fortnine.ca/en/permatex-diel...0187&555=10173
It was running fine for about a week until the CEL came back on. Haven't tried that grease
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Old 04-03-2018, 08:37 AM
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Awesome. CEL came on and running rough again this morning! Back to the dealer on Thursday....

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Old 04-03-2018, 04:38 PM   #17
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I bought it in December 2017 so Iím the 2nd owner. Bought it with about 55k on it and put about 5k on myself now.

I dont have any experience with Jeep corporate. You think they would do something in this scenario or maybe not since Iím not the original owner?



It was running fine for about a week until the CEL came back on. Haven't tried that grease
engine and power terrain is 5 year 100 000km for the 2015. being the second owner will cause issues. phone corp and see what they say!
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Old 04-04-2018, 09:37 AM
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engine and power terrain is 5 year 100 000km for the 2015. being the second owner will cause issues. phone corp and see what they say!
Thanks for the input!

Here's a link to my dealer's powertrain warranty (bought it certified pre-owned).

Basically, it says the following engine parts are covered:

"Cylinder block, cylinder head(s), rotor housings and their internal parts, intake manifold, exhaust manifold(s), timing gears, timing chain(s) or belt(s), timing chain or belt tensioner(s) and timing chain or belt cover, valve covers(s), flywheel or flexplate, ring gear, harmonic balancer, oil pump, vacuum pump, water pump, oil pan, turbocharger or supercharger housing(s) and their internal parts, waste gate, intercooler, engine mounts, and EGR valve."

So according to this and my service tech, the engine wiring harness isn't covered.

Does anyone have any experience with bringing their Jeep to the dealer for repair and the dealer not fixing it properly the first time around? Is there any recourse I have at this point? I feel pretty dissatisfied with my service so far.
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Old 04-04-2018, 10:48 AM   #19
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Forget water in the gas additives. All they are is ethanol and E10 is already 10% ethanol and will absorb and burn any water in the system.
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Old 04-04-2018, 01:03 PM   #20
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From glancing at the warranty for your year, it looks like the wires are only covered for a couple of years.
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Old 04-04-2018, 03:07 PM   #21
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Thanks for the input!

Here's a link to my dealer's powertrain warranty (bought it certified pre-owned).

Basically, it says the following engine parts are covered:

"Cylinder block, cylinder head(s), rotor housings and their internal parts, intake manifold, exhaust manifold(s), timing gears, timing chain(s) or belt(s), timing chain or belt tensioner(s) and timing chain or belt cover, valve covers(s), flywheel or flexplate, ring gear, harmonic balancer, oil pump, vacuum pump, water pump, oil pan, turbocharger or supercharger housing(s) and their internal parts, waste gate, intercooler, engine mounts, and EGR valve."

So according to this and my service tech, the engine wiring harness isn't covered.

Does anyone have any experience with bringing their Jeep to the dealer for repair and the dealer not fixing it properly the first time around? Is there any recourse I have at this point? I feel pretty dissatisfied with my service so far.
The warranty you linked looks to be the dealers own warranty. Your Jeep should still be covered by the manufacturers warranty. It should have a 100,000 mile limit on the powertrain warranty.
Also, I would ask them to show you where the wiring is bad (that is not a normal failure). Then I would simply fix the wiring if they can actually show you where it is bad. It is just wires.....
Sadly I fear they really don't know what is wrong and are just guessing.
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Old 04-04-2018, 04:34 PM
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The warranty you linked looks to be the dealers own warranty. Your Jeep should still be covered by the manufacturers warranty. It should have a 100,000 mile limit on the powertrain warranty.
Also, I would ask them to show you where the wiring is bad (that is not a normal failure). Then I would simply fix the wiring if they can actually show you where it is bad. It is just wires.....
Sadly I fear they really don't know what is wrong and are just guessing.
I'm afraid they don't know what's wrong too

The dealer promised that they will "make it right" so I'll report back tomorrow once I've brought it in again.

I'll go over the Jeep powertrain warranty again, just in case.
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Old 04-04-2018, 07:54 PM   #23
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I'm afraid they don't know what's wrong too

The dealer promised that they will "make it right" so I'll report back tomorrow once I've brought it in again.

I'll go over the Jeep powertrain warranty again, just in case.
I am guessing prob just a bad ignition coil connector
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Old 04-04-2018, 10:58 PM   #24
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First thing that comes to mind for me---- the last time I bought a new Chrysler vehicle (not the Jeep) and had a check engine light come on, I pulled over and called the dealer. They told me if the light was on STEADY, I can drive it and bring it in for check up/repair when I could.
If the light was FLASHING!! that I should pull over and call a tow truck to get it looked at right away.
In other words, CEL on:
Steady- carry on.
Flashing- shut'er down!
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Old 04-05-2018, 08:56 AM
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A little late on this, but here's the description of services from the dealer on Monday:

"Found cylinder number 5 coil insufficient ionization code active. Load tested wire for K16 coil driver from PCM and circuit is open. Removed upper plenum and traced to back of transmission. Hard wired K16 circuit from PCM to #5 coil and road tested from 59885 to 59908 miles. OK now."

Not really sure what the majority of that means. Headed to the dealer in about 30 min. Will give an update.
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Old 04-05-2018, 09:21 AM   #26
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A little late on this, but here's the description of services from the dealer on Monday:

"Found cylinder number 5 coil insufficient ionization code active. Load tested wire for K16 coil driver from PCM and circuit is open. Removed upper plenum and traced to back of transmission. Hard wired K16 circuit from PCM to #5 coil and road tested from 59885 to 59908 miles. OK now."

Not really sure what the majority of that means. Headed to the dealer in about 30 min. Will give an update.
It sounds like they are saying that the wire from the PCM (the computer) to coil #5 (that tells the coil to fire) was open (i.e., the wire was no longer connecting the PCM to coil #5). So they ran a new wire and it fixed the problem.
That seems like an odd thing to find.
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Old 04-05-2018, 10:01 AM
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It sounds like they are saying that the wire from the PCM (the computer) to coil #5 (that tells the coil to fire) was open (i.e., the wire was no longer connecting the PCM to coil #5). So they ran a new wire and it fixed the problem.
That seems like an odd thing to find.
Okay that makes sense. When i brought it in on Monday, the guy at the front told me he's never seen an insufficient ionization code before. The whole thing seems odd to me and them too, apparently.

Are there any thoughts on what else could be causing the problem?
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Old 04-06-2018, 02:21 PM   #28
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Thanks for the input!
Here's a link to my dealer's powertrain warranty (bought it certified pre-owned).
Basically, it says the following engine parts are covered:
"Cylinder block, cylinder head(s), rotor housings and their internal parts, intake manifold, exhaust manifold(s), timing gears, timing chain(s) or belt(s), timing chain or belt tensioner(s) and timing chain or belt cover, valve covers(s), flywheel or flexplate, ring gear, harmonic balancer, oil pump, vacuum pump, water pump, oil pan, turbocharger or supercharger housing(s) and their internal parts, waste gate, intercooler, engine mounts, and EGR valve."
So according to this and my service tech, the engine wiring harness isn't covered.
Does anyone have any experience with bringing their Jeep to the dealer for repair and the dealer not fixing it properly the first time around? Is there any recourse I have at this point? I feel pretty dissatisfied with my service so far.

Hi balakay,
We would be more than happy to get you in contact with the proper teams to have this looked into. Feel free to send us a private message with additional details.
Julie
Jeep Social Care Specialist
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Old 04-09-2018, 09:50 AM
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Hi balakay,
We would be more than happy to get you in contact with the proper teams to have this looked into. Feel free to send us a private message with additional details.
Julie
Jeep Social Care Specialist
Thanks for checking in, but I think my issue has been resolved. The dealer replaced the PCM which was covered under warranty. They did 2 road tests, and now that I've had it over the weekend, everything seems to be working fine. Here's the write-up from the dealer:

"Run test for P2314, P0305, swap coils from 5 to 1, miss stays at 5. Check for power to coil from ASD relay, 14V running. Pin out circuit K16, 1.5 ohms. Found when eng cooled off has no miss. Let run and miss comes back when hot, rec replace PCM."

Hopefully this thread is helpful to anyone else that comes across this problem. Thanks for everyone's help!!!
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Old 04-13-2018, 12:09 PM
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Hi balakay,
We would be more than happy to get you in contact with the proper teams to have this looked into. Feel free to send us a private message with additional details.
Julie
Jeep Social Care Specialist
Spoke too soon; Friday the 13th struck me with bad luck. CEL came on again, same issue....

Will be going back to dealer on the 17th.



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