Rough/Unstable Idle or Stalls

1. With cold engine:
a. Open or shorted coolant temperature sensor.
2. With hot engine:
a. Defective oxygen sensor.
b. Idle speed too low.
c. Stuck pressure exchange solenoid valve.
3. Under any condition:
a. Faulty ignition system.
b. Open idle position switch.
c. Loose injector connector.
d. Defective fuel pump.
e. EGR control solenoid valve sticking.
f. Open EGR control solenoid valve.
g. Defective air flow sensor.
h. Defective pressure sensor.
i. Defective throttle position sensor.
j. Defective ECU.