There isn't a specific symbol *for* the 2004 PT Cruiser check engine light that's different from other vehicles. The check engine light is universally represented by a symbol that looks like an engine, often stylized. It's typically yellow or amber.
If you're having trouble with your check engine light, you'll need to have the car's onboard diagnostics (OBD-II) system scanned to get the specific trouble code(s) that triggered the light. That code will tell you what the problem is.
