it's possible
no
IAC (Idel Air Control Valve)
water in the fuel can cause an idling motor to sputter and/or die.
The P0446 code indicates an issue with the Evaporative Emission Control System (EVAP), specifically related to the vent control circuit. While this code itself typically won't directly cause a car to stop idling, it can be a sign of an underlying issue that may affect engine performance. If there are additional problems with the fuel system or air intake, those could lead to rough idling or stalling. It's advisable to have the vehicle diagnosed by a professional to pinpoint the exact cause of the idling issue.
my 1990 300zx is idling rough what could cause this?
Replace the Idle Air Control Valve only about $50. This would cause funny idling and stalling out.
old fuel filter
Yes, it could.
A bad coolant temperature sensor is one thing that could cause an idling speed problem with a Peugeot 406. There could also be a problem with the idle control valve.
The radiator cooling fan is most likely not working.
Loose connections or worn parts in the light switch.
a fuse