O2 Sensor code P1053, P2099, P0157 2003 Cadillac CTS and small garage up date (new tools)

Bought a 03 Cadillac Cts check engine light was on and has some codes. Replaced the sensors. Looks like one the previous owner tried to replace and couldn't do it. I actually used my air impact to bust it lose. Before I did any of this I sprayed the base of the sensors down with WD-40 a couple times then started the car up to heat up the exhaust and help the wd40 seep down into the threads. After it was hot I soaked it a couple more times. Then used the impact gun on the Sensor 2 and it came loose with no problems. Sensor 1 I just used a long ratchet and with only one or 2 grunts it busted loose too. Got a new air compressor and sandblast cabinet for Christmas

If your interested here are few of the tools I use throughout the shop that I recommend. https://www.amazon.com/shop/2lateiwonorganizedchaos ... https://www.youtube.com/watch?v=yTdUee1wyPs