[Mahyoub A.]

Ever since i started doing remote tuning my car has been losing all power under wot. Also throws a bunch of codes that i will list. Thought it could have been the tune but even when i went back to stock file the problem persisted. Its saying loss communication to chassis control module and invalid data received from ecm/pcm aswell as random misfire. Im so lost because I’ve diagnosed everything that ive seen on the forums. Checked harness by passenger header and no sign of any burnt wires. They have been ziptied a few inches away. Changed new plugs and new wires. Checked all the ground wires i could possibly see and nothing seems to be off. Was informed to check my dsx e85 sensor that i put on myself checked the main connector that i tapped into for the e85 system and everything seems to be fine. Going on about 2 weeks with this issue and im beyond frustrated. The only thing that ive yet to figure out is i just recently heard a sparking sound from under the hood when i was testing the car after i found out one of my new ngk plugs somehow is cracked(not sure if it was from factory or something cracked it). I tried check it out late at night where theres no light but still nothing. Just heard it spark few times and i believe it could be from driver front side of the car. Please point me in the right direction!!!
2018 A10 ZL1 with basic boltons
Codes :
C0242
U0401 invalid data received from ecm/pcm
U042B invalid data received from chassis control module A
P0300 random misfire detected
P0420 catalyst system efficiency below threshold bank 1