Need help

So I'm sure I screwed up my wife's vehicle. I was installing a remote starter for her and I thought I wired it all up correctly. Now my car won't start and I have no dash panel but a service engine soon light. Any ideas what to do. I have checked all fuses they seem fine. I removed the remote starter. And all the wires are tapped up and secure. But any help for ideas would be greatly appreciated

What is the code?

What code, like the style of remote car starter. Because I don't understand what you are wanting

Your SES light is on, so a code might be set....

What year? And does your vehicle have PassKey or PassLock Security system?

Does the vehicle crank over and not start, or it doesn't crank over at all?