My instant pot didn't work at all, giving me a CH6 type error message. I watched a youtube video about diagnosis. Ordered a new pressure sensor off Amazon. Watched another youtube video. Went into the guts of the IP and replaced the pressure sensor, only dropping screws into the nether regions of the pot twice. Put it all back together, plugged it in, and it works!
This is a big deal for me. I'm a nerdy old academic with soft hands and absolutely no confidence in my technical/manual ability.