Dreaded Check Engine light on after 3 weeks of Ownership

[baabootoo]

After replacing the downstream O2 sensor to no avail, yesterday the upstream O2 sensor was replaced and when the technician was reprogramming the PCM, he found a just released update to flash the module with. Apparently, this update to address these check engine lights has been in the works and now available to dealerships. Will continue to monitor things but been told this new update should take care of things once and for all. Thanks to all who provided support and guidance during this 4-week ordeal and look forward to finally being able to drive with confidence this new Charger Scat Pack Plus with the Sixpack engine.

Was it this one I posted a few days ago???

Technical​

The 2026 Dodge Charger is affected by a Technical Service Bulletin (TSB) that involves inspecting and possibly reprogramming the Transmission Control Module (TCM) with the latest available software. This TSB addresses false Malfunction Indicator Lamp (MIL) illumination and fuel trim DTCs P2096, P2097, P2098, P2099, and P068A. The TSB applies to 2026 Dodge Charger (LB) vehicles equipped with the 3.0L Twin Turbo Sixpack HO engine built on or before March 09, 2026. Authorized technicians will use the wiTECH diagnostic tool to inspect the current TCM software version and reprogram it if necessary.
dot.report
For more information on TSBs and to check for any outstanding issues, you can visit the official Dodge Technical Service Bulletins page or contact your local Dodge dealer.

 

[gasort]

Mine was fixed this morning when I finally got in for an appointment. There were a few items like lean on bank 2 (weird for an inline engine?) and something about the computer deenergizing too quickly. I'll find the paper they gave me with all the codes and add them tomorrow. Turned out there was just a couple software updates and after that the light went away and hasn't come back. I never actually felt like there were any issues with the car while the light was on, so I'm not sure what actually got fixed other than some telemetry that may have been incorrectly reported.

Anyway, sure is nice to not see that light on my dash again, it was embarrassing!

Codes pulled:
- P2096-00 : downstream fuel trim system 1 lean
- P2097-00 : downstream fuel trim system 1 rich
- P2098-00 : downstream fuel trim system 2 lean
- P2099-00 : downstream fuel trim system 2 rich
- P068A-00 : ECM Power De-Energized Performance-Too Early

Found PCM and TCM update regarding exact codes and followed `TSB 18-022-26 Rev. E` to perform TCM, PCM, and ISCM updates

 

[baabootoo]

Great

 

[2026 Metalflake Green]

Hey all, as I posted here before I've been looking into the purchase of a '26 Six Pack Scat Pack.
But the three cars I wanted to test drive had dead batteries and I was concerned so I passed.
Another one was just offered to me and the window sticker shows an early May build date.
So does anyone know if Dodge addressed all the electrical gremlins in these later builds?

thnx

 

[2026 Metalflake Green]

You might be ok with a May build date. I bought mine on April 13th and have been trying to address a multitude of issues with the dealer all with not much luck. Problems include check engine light on all the time with no fix, steering wheel bobs back and forth when driving and other minor stuff in the fit and finish area. They are really nice cars when everything works, but boy are they big and most will not fit in a standard garage without putting the mirrors in which are not power and should have been. Hopefully you will have better luck with the more recent build. I say if you want it go ahead and get it. Much of your experience will rest on how attentive your local Dodge dealer is, and I found out the hard way that mine has no training or real experience with these cars.

 

[daperry]

Per my invoice detail from Tuesday's service update, the PCM flash to correct these issues had a 5/21/2026 release date. Still raining her so I have yet to really test everything but so far, no issues and it appears to run smoother and better performance than before.

 

[2026 Metalflake Green]

Glad to hear it. I hope I can get there soon also.

 

[Chevyguy]

I got a got a pile of codes when I broke the harness clip for my TMAP installing the JB4, it flooded out the engine and cleared out after getting the clip connected to the TMAP fully and removed the JB4

All those codes cleared out of the permanent codes list after a tank or two of gas, but I have gotten the P2097 a few times and it even shut off the Check engine itself. Just popped back today, I already got the PCM flashed by the dealer before delivery on April 22

Runs just fine, still does start/stop with the light on, but not remote start