Bitmapped

The dealer ended up replacing the head, which resolved the problem. I was still within the 100,000 mile powertrain warranty, so I didn't have to pay out-of-pocket for the work.

I have a 2015 Journey with the 3.6L V6 and about 78,000 miles on it. Earlier this month, I got a check engine light while idling stopped in traffic. I pulled the code, P0302 Cylinder #2 misfire, and cleared the codes. A couple days later, while idling in a parking space, CEL with same code popped up again. It went away on its own a couple days later. I thought maybe it was a bad tank of gas and moved on. A couple fill-ups and about 1,000 miles later, the CEL came back with same P0302 code. Idle seems a bit rough but I notice any problems when moving. I know the 2011-2012 Pentastars had a lot of problems with the left-side cylinder head causing cylinder misfires, to the point where leak testing the cylinders was the first diagnosis step. I understand later head designs after 2012-2013 were supposed to fix the problem but I've seen some sporadic postings of 2014 Pentastars with head issues. Is the thinking even with the newer vehicles that misfires in the left bank are most likely a head problem? I'm trying to figure out if I should first try to replace the plugs/coil pack myself or should just take it into the dealer. I don't want to get into a big dealer bill if it's probably something I could have handled myself or had my local mechanic do. Thanks for any guidance!

Just to close the loop, figured I'd post an update. I've put about 300 miles on the car since the incident and haven't had any problems. I did go in for my scheduled appointment at the dealer this morning. Their code scanner pulled ABS-related codes. They said they inspected the connections and components and nothing seemed amiss. Unless the problem occurs again, we're just going to chalk this up to some sort of glitch.

I called the dealer. They said the earliest they can get me in is Friday. (It's Saturday as I write this.) I guess I'm going to keep driving the car in the meantime and just make sure I stay in places where I have cell service. I used a code scanner. It pulled the following logged, not current, codes: U11BC - lost brake switch, which explains why it didn't recognize I had the brake depressed to start U1110 - PCM didn't receive speed signal from ABS over CAN-C bus U1120 - PCM lost wheel distance signal P03D1 - ??? B3CD1 - ??? Does anyone know what P03D1 and B3CD1 are? Googling hasn't been helpful. I took the car to Advance Auto Parts and had them check the battery and alternator. Battery comes out good (494 CCA on 525 CCA battery, 12.8 volts) and alternator checked out (14v no load, 13.85v under load) so I don't think it's a problem with anything electrical. To me, it seems like all signs are pointing back to a problem with the PCM.

Has anyone experienced any problems after getting the 49U update done? I had my 2015 Journey done yesterday. It drove fine yesterday but today, when I was about an hour away from home, the instrument cluster suddenly went haywire as I was driving. Check Engine, Traction Control, Brake, and ABS lights turned on plus a Service AWD message on the cluster LCD. The car drove OK. I got to a nearby parking lot and shut off the car. It wouldn't start - pressing the on/off button just cycled through accessory/run/off even with my foot on the brake. I ended up disconnecting the negative battery terminal and when I reconnected, the car started and ran fine. I'm thinking something got botched in the update?

Journeyman425, Would you mind enabling DRLs for me when you have a chance? VIN last digits are FT560237. Mileage is about 50. It's a new 2015 Journey SXT. Thanks!