The gas gauge and the coolant gauge does not work. Also the ignition switch keepsmaking that loud dinging sound when you are driven.

possible short. backtrack the ignition wiring that you replaced.

If the gas gauge does not work correctly and the temp gauge reads hot, you could have a problem with the instrument panel.
Both gauges get power from the same circuit, but each gauge is grounded by its own sending unit.
If the temp gauge is reading correctly, you could have air in the cooling system and it is not actually full of liquid coolant.

I would say the switch is what you talking about
replacing,not the key cylinder

Never a simple solution to finding any problem, unless
the person working on the car gets lucky or has a sense
for certain problems on a some vehicles

It's probably your ignition not being exactly disconnected when you remove the key.Until you get a new ignition (keyswitch),just jiggle the switch with your fingers after you remove the ke7y and see if the dinging stops. my Aerostar has that problem right now. don-ohio

has anything been done recently to car. sounds like you have a short either burnt up wiring on the power side posible fuse block under dash, or wiring going to your security module,

sending unit in tank needs to be replced, drop down tank and replce

Sounds like a faulty body control module, or the forward control module. Possibly the cluster is going bad. Is it still under warranty? Take it to the dealer, which you may have to do anyway.

check your ingitoin switch (the key) did it to me on volt gauge wouldnt work ding go dead and check guage light would come on

check the fuses

Ignition switch and wire harness for ignition switch. My husband did both. I was losing dash gauges intermittently and overdrive. Now that is fixed and six months later looks like I need the multi function switch(turn signal, wipers, cruise lever). My husband has to take that all apart again for this problem. My turn signal blinker noise won't shut off. Driving me crazy.