[2SS Capt]

Originally Posted by 2023_ZL1-AUTO

So, this past Saturday a group of us from our local Camaro club went to Cars and Coffee at the Hungry Buffalo in the Hocking Hills! It was a huge turn out of cars and spectators and a total AWESOME time, and one of the largest C&C's I've attended! The best parts was the club members all drove down in a "Camarovan" <--- see what I did there!

When the event was over, we decided to grab lunch together at the Hungry Buffalo (great food)! I grabbed my Key FOB out of my pocket and pressed the lock button, but NOTHING happened! I pressed it like 3 more times and still nothing, so pressed the button on the door pull to lock the car. I thought, hmmm that's weird, and went in for lunch. When we were ready to leave, again, I had to use the button on the door pull to unlock the car. I started it up and noticed immediately it was running really rough and it died after about 6 seconds. I started it up again and it stayed running, but was still running rough. I revved it, and the RPMs just climbed really slowly (even after letting off the peddle and then the RPMs just came back down to idle slowly. I noticed, I had all kinds of dash lights on (including the check engine light) and had scrolling messages about different issues. I read the codes with my Banks Data Monster gauge (it's so sweet!), and here is what it showed:

P0700 – Transmission Control System (MIL Request)
U0073 – Control Module Communication Bus Off
U0101 – Lost Communication With TCM

I reset the codes, but the check engine light stayed on. So, I decided I'd just limb back home. But, when I started driving I noticed the car wouldn't shift out of 1st (I have an automatic). I decided to try manual shift mode, but, it still wouldn't shift. The dash indicated it was still in [D] automatic mode when I actually had it in manual shift mode. I pulled into a parking lot, shut it off, started it again, and drove a bit, but the problems persisted. I had to turn it off, start it and drive it like 3 times before it started acting normal. I wasn't running rough any longer and it would shift in both automatic and manual mode!

After getting home, I decided to take a few short trips, and after the 3rd trip the check engine light went off. Like always, after driving I hooked up my battery tender. I went in the garage a few hours later and noticed the charger was showing a [Red] light. It shows the +cable issue, but it was all connected correctly.

So does this mean bad battery? I remember once before, when my battery died over the winter because the charger was unplugged, something similar happened. My car is a 2023 that I purchased in December of 2022. I'll get the battery tested, but could it be time to replace the batter already after only owning the car 2.5 years? Take Care!

Not sure if this is your issue, but you might want to have a read through this: https://www.camaro6.com/forums/showthread.php?t=585372