Dual Zone Climate Control: -It is possible with dual zone climate control that every passenger in the car can have separate air conditioning temperature.
IAC Idle air control sensor. The cylinder shaped sensor on the throttle body
It may leak out and/or blow the cap off. The loose cap could possible land in or near the belts (although this is unlikely) causing further problems including breakdown (stalling or overheating) or power steering failure which can cause loss of steering control and a crash. Usually it just leaks out a little, though.
Try replacing the idle air control valve (IAC)
Possible causes, idle air control valve, dirty throttle body, egr valve clogged, major vacuum leak, maf dirty, intake restriction.
idle control valve is shot!!
Torque Converter Control Solenoid. It controls the lockup clutch in the torque converter, when it malfunctions the clutch can fail to engage or disengage properly causing shuddering at speed and stalling at idle. It is found inside the transmission as part of the valve body.
Idle air control? Fuel pump? Coil?
It is possible for hot air to be coming out of the driver's side and cold on the passenger's side if there is a dual temperature control on the heater/AC unit. Try adjusting the temperature controls to see if that fixes the problem.
When my steering caused stalling, the fluid level was low. Filling might fix it. There is sometimes a shut off under the powersteering pump for pressure control that goes bad when the pump is bad. Mary
If it only happens when you're in gear, maybe your torque converter isn't unlocking and is causing it to stall at a stop.
Check your Idle Air Control Motor located under neath the Throttle Position Sensor.