Continuous Memory Diagnostic Trouble Code (DTC) 211 indicates two successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall.
Possible causes:
Arcing secondary ignition components (coil, cap, rotor, wires, plugs, etc.).
On-board transmitter (2-way radio).
Loose wires/connectors.
Check the basic stuff for this one first. Spark plugs, wires, make sure you're getting a consistent spark from the coil pack. If everything is good with those, then you'll have to start troubleshooting the Crankshaft Position Sensor and the Camshaft position sensor.
DTC 411
Cannot control RPM during KOER self-test low RPM check.
DTC 412
Cannot control RPM during KOER self-test high RPM check.
Your IAC (Idle Air Control) motor is either gunked up something fierce or the solenoid is bad. Take the IAC off and give it a good cleaning, preferably do it a few times, then put it back on and see if the idle is any better. If the little rod inside the motor doesn't move freely, you might be looking at a new IAC motor.