2012 Dodge Grand Caravan Questions

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what is a reasonable price to repair one wheel lug bolts and spinedal
What seems to make the problem better or worse? don"t know
How long have you had this problem? don't know
Mileage on the van is less than 60,000.
they just do and only 46,000 miles on it
Van has problems starting intermittently. Took it to a dealership, was charged 120.00 and told it had a loose battery cable. It started doing it again. Read a couple of forums that seem to think a neutral switch that Dodge calls a TR sensor is at fault. Does anyone know how much this costs or even if I'm barking up the right tree? Shifting can be rough at times, and there is a distinct clunk when engaging transmission from a stop at times.
I went out to the van and put the key fob in and the man didn't start. It started making clicking noises and the lights on the dashboard started flickering. The key fob was stuck and I turn the van on or turn it to the off position. My husband got the key fob out and opened the hood and looked at the spark plugs. Some were clicking and vibrating. He ended up disconnecting the battery to make it stop. Later we went out to try it again and used the regular key instead of the key fob. This time the GPS screen displayed "security screen" and wanted a security code punched in. If we try to turn the van on it goes back to the clicking.

Also randomly the other day we came out to leave and the van was in drive when we got out there and not in park .... don't know if that is related in any way or not.
Just got back from a long road trip from Florida in as soon as we got home I know this this knocking noise sounds like it's coming from the intake but it only does it when I am sitting there at idle and doesn't do it when I'm driving around
Dust leaks everywhere all vents defrost it's the nicest but the worst dusty vehicle I. Have ever had. Is there a fix the dealer says nothing's wrong but I have dirt bank in the van.
After I accelerated to pass, the throttle stuck and warning light came on. I could slow using the brake and the problem seemed to be resolved after I kicked the gas peddle. The light has not come back or nor has the throttle given any further problem. Should I worry and has there been any recalls to this effect?
Turned off machine last eve key won't go all the way in the ignition , is there a reset , or relay I can override,,,,thanks ...
First time this problem has happened...

here in ND the temps get below 0 what action can be taken to combat this? it use to be a engine block heater ..
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