How To Fix -90 error code

[Gem_e2]

found this on search code 90

Bunch of T2 Controllers

I just swapped out my T1 with a T2 this weekend. Understand they’re a little better at dissipating heat and are generally a better controller. You need 3 parts - 0106-00678 ASSY, WIRE HARNESS - SPLIT HEATSINK JUMPER 0106-00827 ASSY, WIRE - SPLIT HEAT SINK JUMPER 0606-00176 CONNECTOR, T - WIRE The harness will convert you from 8 pins to 12 for the gauge. Split heat sink and T-Wire will take power from pin #2 and run to pin( #23. edit 2026 DB not pin 23 but pin 21) Without it you’ll get err…

Edit, not pin 23 but pin 21