Crank, but will not fire

We can assume that the reason you can't communicate with the PCM is the same reason the engine won't start. This could be as simple as the PCM is faulty or the power and ground to the PCM is faulty. So we need to check power on the green/yellow wire and the grounds that are highlighted in the diagrams. If you have no power at the PCM with the key on then the main relay and fuse feeding the relay need to be checked.

Let us know what you find here and we can go from there. Thanks

https://www.2carpros.com/articles/how-to-check-wiring

Okay. I would start with a battery but it is not starting then we need to check for spark and fuel. If we don't have either of those, it could just be a failed PCM. However, I would not buy it if this is not fixed unless you get one heck of a good price as it sits. Basically the approach is, you may need a fuse, a PCM, or an engine. If he is not willing to fix it before he sells it to you then you are taking all the risk and risk needs to have a large dollar amount assigned to it before it makes it worth taking the risk.

Otherwise, tell him to call you when it is fixed and you will come buy it. Without really digging into this it is a large risk you are taking buying it as is. I don't see nearly enough to say this is going to be something simple or cheap.

Correct. Being flooded means there is too much fuel in the cylinders. That doesn't have anything to do with the ability to communicate with the modules. That is a wiring issue or module issue. If the engine is not starting, you need to check if the plugs are firing and if it is getting fuel from the injectors.

For the engine to start you need three things. Compression, fuel, and spark. So you need to check all of them starting with fuel and spark.

If you don't have either fuel or spark then I suspect the PCM is the issue.

https://www.2carpros.com/articles/car-cranks-but-wont-start

You are welcome. Let us know if you have more questions or how you make out. Thanks

I attached the info on this sensor and the process to replace it. I doubt the installation was wrong unless they just didn't tighten it. However, it should be checked. Then I put the testing there for this sensor.

Can you provide me the actual code that you are getting and I will give you the testing for that code? I suspect you have a wiring issue or control module issue. Thanks