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Discussion Starter #1 (Edited)
So I have a evo 14 mr and recently got it tuned, Weirdly enough, when I go WOT the trans let’s go and and a message pops up saying “ACS system service required”. When this happens it also throws code p1870, key cycle clears the code and the system service required thing. Also one time my car wouldn’t down shift to 1st gear, key cycled fix it and never happened again don’t know why. Anyway I take my car to my dealership and they told me my trans is done, I have the DTC sheet and the codes are

p1855
U0100
U1417
C121C
U0401
U0100
C1290
U0100
Is my trans really done for? Almost forgot, supposedly it’s also leaking trans fluid, at this point I don’t know if the trans is 100% done for, or if it’s just the tune. Any help will be greatly appreciated. P1855 is shift fork 1 jump out, but I don’t really know what that means, and if again someone could help I’d be grateful. Thanks
 

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Most of those codes trigger from improper calibration in the ECU.
ASC service required likely means the car is over boosting.
I would recommend going to another tuner.
 
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