Supra drivetrain malfunction

[suprazg]

So ever since i put a catless downpipe i been getting drivetrain malfunction i could still drive and everything just reduce power and when i turn it off and start it after a couple of hours it would go away but recently i got my ecu unlocked and tuned it to stage 2 and now i get it like every week and when i do the car doesnt not start i have to jump start it and when i do the message goes away
so i used the computer to read the codes and its something with the battery but the car is like brand new how can a battery get messed yo i do have under glow attached but it is attached with a button so if i dont press the button the car cant get drained so its no way the unglow is causing it i havent it turned it on for monthsss now so i am lost and dont know what to do anyone knows olease lmk the car is a 2022

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[zrk]

Well. If it says it's the battery it's the battery. What's the code?

 

[suprazg]

this is whats comming up could the battery really be fucked up in a year ? and i drive it a good amount like almost everyday or so

 

[bryan928r]

So ever since i put a catless downpipe i been getting drivetrain malfunction i could still drive and everything just reduce power and when i turn it off and start it after a couple of hours it would go away but recently i got my ecu unlocked and tuned it to stage 2 and now i get it like every week and when i do the car doesnt not start i have to jump start it and when i do the message goes away
so i used the computer to read the codes and its something with the battery but the car is like brand new how can a battery get messed yo i do have under glow attached but it is attached with a button so if i dont press the button the car cant get drained so its no way the unglow is causing it i havent it turned it on for monthsss now so i am lost and dont know what to do anyone knows olease lmk the car is a 2022

I had the similar problem on a different car. Even though the under glow was switched off with a Bluetooth remote, it was still pulling current from the battery. The RF was messing with the ECU and radio. I completely disconnect it and never had the problem again. I'm not saying it'll solve your problem, but look into that.

 

[Branflakes123]

So ever since i put a catless downpipe i been getting drivetrain malfunction i could still drive and everything just reduce power and when i turn it off and start it after a couple of hours it would go away but recently i got my ecu unlocked and tuned it to stage 2 and now i get it like every week and when i do the car doesnt not start i have to jump start it and when i do the message goes away
so i used the computer to read the codes and its something with the battery but the car is like brand new how can a battery get messed yo i do have under glow attached but it is attached with a button so if i dont press the button the car cant get drained so its no way the unglow is causing it i havent it turned it on for monthsss now so i am lost and dont know what to do anyone knows olease lmk the car is a 2022

1. Identify if the underglow is still drawing power, is it connected directly to the battery? If it is, remove it or have it draw power from an ignition regulated power source
2. Did you store the car for winter? Was it on a tender? These are AGM batteries in the Supra and unlike lead acid, they don't recover well once totally drained. Replace the battery, if you're feeling fancy get a Lithium Ion.
3. None of the above? Idk lol

 

[suprazg]

I have a update, so I redid everything that did. I put the ECU back in and one of the wires underneath. I guess I did it was loose underneath the ECU and that what was causing the car to do all that I guess it was like a connection to the battery alternator or something I don’t know the code app again is there a Dme caster not terminated, but it fixed it now so far

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