Solved issue:
Turns out the computer was not properly placed back in with the plastic tabs fully pressed in. Once I tried to set the computer again, and it fully set it, the car started right away.

Thanks everyone for the help. So, I am buying the removal tool , to make sure it is properly the computer is properly set back in and all contacts are connected properly. I'm also buying a VIDA scanner. The tutorials all explain its use pretty thoroughly in general...but in this particular case , an...

Thanks for that explanation! That makes sense. I do believe it is in place properly, although I can't 100% say that for the pink sliders. The grooves that the pink sliders interface with are slanted. (See photo below.) As you move the sliders toward the locked position they actually "pull"...

Thank you so much for your reply. I did not use the proper tool, I used a screwdriver. I do believe it is in place properly, although I can't 100% say that for the pink sliders. If the computer was not properly back in, would I be seeing other errors? Would it be pretty obvious if that was the case?...

Thank you so much for your response. I tried the locking and unlocking 5 or 6 times, and unfortunately that did not work. I don't have a way to check the voltage today, but from what I was told by someone who helped me yesterday, there was no power coming to the fuel injection at all. I called a mec...

I recently had my Volvo fail smog. The fixes seemed simple. One was replacing the PNP sensor, and the other was cleaning the computer ports. I followed instructions on youtube (first mistake). I pulled out the computers , (After disconnecting my battery), and used a tiny bit of the cleaner they sugg...