# How To Fix -90 error code **URL:** \ **Category:** GEM Forum\ **Created:** [January 28, 2024, 1:23am UTC](https://community.electricforum.com/t/how-to-fix-90-error-code/27411 "2024-01-28T01:23:52Z")\ **Posts on this page:** 1\ **Showing post:** 11
**Author:** ![Gem\_e2](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/gem_e2/32/1849_2.png) [@Gem\_e2](https://community.electricforum.com/u/Gem_e2)\ **Post date:** [January 28, 2024, 3:50pm UTC](https://community.electricforum.com/t/how-to-fix-90-error-code/27411/11 "2024-01-28T15:50:06Z")
found this on search code 90 > [@Bunch of T2 Controllers](https://community.electricforum.com/t/bunch-of-t2-controllers/14986/6): > > 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** --- _[View the full topic](https://community.electricforum.com/t/how-to-fix-90-error-code/27411)._