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What is your question?
I’ve been chasing an intermittent issue on my 2012 Dodge Charger SXT Plus V6 and I’m trying to figure out the most likely culprit before I keep throwing parts at it. It’s happened a few times now. Symptoms: - Randomly stalled while driving around 60 mph on the highway - no check engine left - Car suddenly acted like it went into neutral - After shutting it off, it would crank but wouldn’t start - I disconnected/reconnected the negative battery terminal and it started immediately afterward - Sometimes voltage seems normal, other times I’ve seen high/low voltage behavior - Car occasionally runs rough Codes pulled: - U0101-08 (Lost communication with TCM) - U11C3-00 - P1915-00 - These codes were pulled but I have no check engine light. Things already done: - Serpentine belt replaced - replaced battery - Replaced negative battery cable - Cleaned grounds - Battery current sensor replaced - Alternator supposedly tested “fine,” but issue
How long has your 2012 Dodge Charger had this problem?
More than a month
1 Reply
Hi, this is Bo, an auto expert on RepairPal's Car Genius team! You've done solid legwork here but those U codes pointing to lost TCM communication combined with the fact that disconnecting the battery resets everything is a big clue. This has the fingerprints of an intermittent power or ground supply issue to the TCM or PCM rather than a transmission problem itself. The alternator testing "fine" on a basic test doesn't rule out voltage spikes or drops under load, which can wreak havoc on module communication. I'd have the charging system tested under real driving conditions with a data logger, and have a shop do a thorough inspection of the TCM power and ground circuits specifically. Chasing intermittent electrical gremlins is frustrating but you're closer than you think! If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554