Hello!
Both of those point to a vacuum leak in my mind, at least. Check your hoses and replace. For the 0440, it can be an idea to go over all hoses and fittings in the evap system, and also replace the valve.

- S

Chances are the switch has gummed up or has failed. If you have the ECC unit it is easy to swap out if you get one from the junkyard. It may be a combo issue you may also have a power resistor issue too. If you have an MCC (it won't say Auto on the panel anywhere) then it may be the switch.

Neil.

Usual issues are: 1) ABS module failure. This will affect the speedo, rev counter (possibly), and the odometer. Usually when the ABS module fails it will often trip the engine check light too. 2) Ignition switch failing. Try carefully wwiggling the key when car is running and see what happens. Natur...

Speeds 1,2,3 & 4 indicate that you have MCC (Manual Climate Control).
I agree with Neil - Sounds like your fan speed control has packed it in...

And get those engine codes checked out. Your Check Engine light probably has messages stacked up for you. The good news? If the service light just comes on for two minutes when you start the car, it’s only reminding you that you’ve exceeded your mileage triggered service interval. It can be reset an...

In my experience, P0172 is always caused by a severe vacuum leak. Check your vacuum lines. With the engine running, you might be able to hear a wooshing or hissing sound to help you track down the leak. What rpm does it idle at? P0440 is usually the J and L hose on the charcoal canister. Replacing t...

Find a new unit at a junk yard or pick&pull. It might be possible to tear your unit apart and repair the switch, but that would take quite some time and I am sure you want heat tomorrow.

Non turbo with auto transmission and in "D" idles at 1000rpm.
While in P or N it will be around 900rpm.
N/a manual around 900...Turbos a bit lower...around 800+-50.