Can a non mechanic replace the Cylinder Head Temperature Sensor?

What is your question?

I drove to the library (only 5 miles away). The check engine light came on and the temperature gauge pegged red. Two other warning lights came on: Reduced engine power & High Temperature/Low Oil. I got the codes pulled at Autozone. They read P1299. The AZ rep told me that I could probably replace the Cylinder head temp sensor myself. Thought I'd ask here first.