Let's do some basic checks first. Can you measure your voltage on the relay when cranking? It is on the under hood fuse block (UHFB). I attached the diagram and some other info on the ignition system. Lastly, I attached a TSB that could possibly be the cause.
I am going to assume you have voltage from the relay because your starter engages. The issue is it will not fire. This usually points to no spark or no fuel. This could be a coil issue (EI module and coil packs), PCM, or a crank sensor.
Let's start with the relay and then we can get deeper but we are going to need to verify that the plugs are actually firing. The easiest way to check all of this is to use a scan tool. Do you have access to one of these? If not, can you stop into a parts store and just have them pull the codes or have an auto shop pull them for you. I understand that this is not that easy if the car won't start. Again, let's get the voltage on the relay and then go from there. Thanks
Images (Click to enlarge)
Monday, April 15th, 2019 AT 2:30 PM