If white smoke is coming out of the exhaust when the engine is warmed up , it
sounds like engine coolant is getting into an engine cylinder
Is it a 4 cylinder? Sometimes a 4 cylinder engine will shake a little extra when the AC is running and it's at an idle. You might be able to step up the idle a little extra but 4 cylinder engines are notorious for shaking when the AC is running.
Possible cylinder misfire and/or failing engine mounts.
Could be in need of a tune up.
If the check engine light is blinking that means an engine cylinder misfire has been detected
It could be (a) misfiring cylinder(s). Check the condition of your plugs and wires. Also, check if your engine mounts are not worn.
If your check engine light is blinking , that means a cylinder misfire has been detected
If it is running fine at high revs the most likely problem is an injector
If your check engine light is blinking , that means an engine cylinder misfire has been detected - your vehicle would need to be scanned for any trouble code(s) to determine which cylinder or cylinders are misfiring
If the check engine light is or has illuminated, check for codes first otherwise start with a basic tune up.
Replace engine cushions
The Vehicle shakes because of the virbration produced by the engine at the stop sing
If your check engine light is blinking , an engine cylinder misfire has been detected The vehicle needs to be scanned for trouble code(s) to diagnose and then repair the problem