The most common cause is the O2 sensor. Most parts houses, O'reilys, Autozome, etc. will read the computer for free in the hope of selling you a part.
If it smells musty check the evaporator drain hose hose. Johnny Texas.
The first thing to look for would be an exhaust leak. Check for a fuel leak on the top of the engine.
it is part of the pump assembly
You can not disconnect the check engine light.
With a scan tool.
You replace the fuel rail. Check for a recall
With a scan tool.
The best place to find an engine diagram for a Chrysler Sebring would be in the owner's manual. If you do not have your, contact Chrysler or check your library.
A flashing check engine light is an indication of a severe engine misfire.
check the water level... if that's good try a new thermostat...
With a scan tool.
This information can be found in the owner's manual