[BentZero]

History: I bought an AA8 piggyback from the board and installed it on my 2016 M235i. The module itself was super fun and definitely woke the car up. However, I noticed that around 2,500 rpm the module would cause a big boost in, well, boost or power. That would sometimes cause a CEL. I used torque to clear the CEL.

Today: I removed the module in January because I was taking the car in for routine maintenance. I've been too lazy to reinstall it. I previously had it listed, but I'm not going to sell it now. I think the module did something to my ECU. While driving around I still get the same weird boost in power around 2,500-3,000 rpm and then a CEL.

Idk what else it could be. Is there a way to reset the ECU without loosing all of the coding changes (Comfort access, euro lights, door unlocks, etc) I've made to the car?

This is not a knock on AA. The module itself was super fun. However, I'm questioning if I should have bought it used. I wonder if it was tuned for a previous model, like a 2014 ECU, and something didn't gel with my 2016. Anyway, if a reset isn't possible I'm hoping that an OBD tune can resolve this.

Anyone have a similar issue with a bump in power and then CEL?

[BentZero]

Just a quick update. The issue is gone now that I've done a BM3 DME flashing. Part of the flash process is to clear the learned adaptations in the car.