Turn the key to the ignition position ( where dash lights come on) then hold down the power and a/c (little snow flake) buttons at the same time for 5 seconds all the climate lights will light then it will start the calibration cycle if there is an issue you will get a steady blinking light ( like recirc light usually blend door issue).
P0446 Evaporative Emission Control System Vent Control Circuit Malfunction Cheers
It is for reducing petrol when climate control is switched on
very easy
No, it was an option.No, it was an option.
on fire wall engine compartment
Used Climate ControlSalvage Yard.ebay has them all the time. around 30 bucks. new is over 600
because it does not work.
What is it doing
Remove the cover around the controls and you will see the bulbs inside the climate control unit. It just pulls off.
A 2001 Jeep Grand Cherokee 4.7L would have a 545rfe transmission.
If you have the automatic climate control system, I do not think there are actual "bulbs" in the display as it is all electronic. In my 1988 LeSabre I had to replace the entire control unit which I picked up at a salvage yard. Just a thought.
I believe that it is located in the back left corner. The rear climate control (Heating, AC and Fan) should all be there.