What is that plug in plugs the wall on engine of my pt cruiser?

It's impossible to tell what plug you're referring to without more information. "Plug in plugs the wall on engine" is a very vague description.

To help me identify the plug, please tell me:

* Where is the plug located? (e.g., on the engine block, near the battery, under the hood, etc.)

* What does the plug look like? (e.g., round, square, rectangular, with pins or prongs, etc.)

* What is the plug connected to? (e.g., a sensor, a wire harness, a component, etc.)

Once I have this information, I can better assist you in identifying the plug.