I’ve gotten new batteries. Checked and made sure everything is in place. And I’ve cranked it over using the wire multiple times but it still won’t start with the key.

 

Now that it will crank, do not wear down the batteries. This can damage your FICM.

You need to get a scan tool that will read codes and pull important information from your PCM.

Options:
ScanGaugeII (it is expensive, sort of clunky, not a good code reader)
Smartphone apps:
1. Torque Pro (nice interface, but only an average code reader)
2. ForScan Lite - decent interface, GREAT code reader

For the phone options, the app will either be free or around $5. You will need an OBDII adapter.

The type of adapter you use depends on your phone (Android or iOS)