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Discussion Starter #1
My sister has a 2011 town and country that already had the front head replaced due to the multiple cylinder misfire codes. Now it will occasionally run very rough (shakes the vehicle) with the service engine soon light flashing and then have multiple cylinder misfire codes on the front cylinders. It happened last fall and again in the last month or so. I don't have the exact codes that were displayed the last time, I will add them if she provides them. Any ideas? She needs it solved so she can trust the van. Taken it to dealerships and they have no idea and neither have local mechanics. She is close to trading it off and buying a Honda or Toyota.
 

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How often is this happening, and how long does the trouble last?
I have something similar that happens occasionally in spring or fall. It is so infrequent that I have been unable to track down the cause. With mine I noticed it shaking at idle or I notice an extreme power loss for a short time. Most of the time it didn't last long enough to set off the CEL but it has on a few occasions. The only thing I have found is that on mine the whole 2-4-6 cylinder bank is droppng out. I found that by using the torque app. With mine the trouble is brief - maybe 30 seconds max and has been happening infrequently for a few years now. I have basically stopped worrying much about it. If you find out a fix though I would be interested.
 

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It happens at least twice a year usually in the spring and/or fall, infrequent but it freaks her out, so still very annoying. When it happens she usually takes it somewhere to have the codes read and then they clear the codes and it is fine again or if she is not taking short trips it will correct itself, so significantly longer than 30 seconds. The misfires also cause her to experience lack of power. Linked below is a video of what she experiences when it occurs. She thinks the ODBII code that is read is P0300, but can't remember for sure.
 

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That sounds a lot worse then what mine does. The trouble is you almost need to get it to a mechanic while it is having the problem. Easier said then done I'm sure.
 

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Exactly. She has tried to get to a dealer while it acts up but the Chrysler dealer in the town she lives in refuses to look at it without an appointment. The only dealership that has worked to solve the problem is about an hour away and it is never acting up when she takes it in there. It seems like a computer glitch, but doesn't look like any PCM flashes are out there for this specific issue. How does a flex fuel vehicle deal with the variation in fuel make up from E85 to standard fuel with 10% ethanol? She always runs the 10% because it is least expensive and 87 octane is what is recommended in the owners manual, but she lives in northern Minnesota and the fuel additives used in the winter up there are different than what is used in the summer. So if a flex fuel vehicle has sensors to determine fuel being used, is the fuel change in the spring and fall confusing the sensor? Again, I don't know how the flex fuels handle variation in gas so I am just grasping at straws at this point.
 

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My sister has a 2011 town and country that already had the front head replaced due to the multiple cylinder misfire codes. Now it will occasionally run very rough (shakes the vehicle) with the service engine soon light flashing and then have multiple cylinder misfire codes on the front cylinders. It happened last fall and again in the last month or so. I don't have the exact codes that were displayed the last time, I will add them if she provides them. Any ideas? She needs it solved so she can trust the van. Taken it to dealerships and they have no idea and neither have local mechanics. She is close to trading it off and buying a Honda or Toyota.
Has your sister opened a case with us, by chance? It would be beneficial to have it documented on our end when she experiences the misfire(s), so we are aware of the concern and can try to help troubleshoot at the dealership level. If it's easier, she can call 800-247-9753 for our Customer Care Department.

Kori
Chrysler Social Care Specialist
 

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Discussion Starter #7
She had been in touch with Chrysler Customer Care previous to the head being replaced. That was more due to the fact that the dealer she was working with at the time did not want to perform the head replacement that others had said was necessary. She contacted a different dealership shortly there after and they were much better to work with and did the head replacement. That definitely reduced the occurrence of the issue but didn't solve it all together. One other detail I failed to mention is that she has had to replace the alternator 2 times in the last 2 years with less than 80,000 miles on the van, less than 20,000 miles on the second alternator. I will have her contact the number you gave to see how they can help.
 

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My 2012 TC didn't the same thing took it to the dealer and they gave me a run around how it was the o2 sensors. So I had them changed and the problem still occurred. So now I have a code coming up for my cat aswell. So I'm assuming the multiple cylinder misfire that was fixed under warranty was putting raw fuel into the exhaust and plugged up the cat ('which no longer has warranty)so now the o2 sensors are getting a false reading making the van run like a pile of crap?
 
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