Coolant I' had my explorer serviced and they never changed the coolant supposed to be done after 4 years,I' wonder if it is easy to do by yourself and how

2001 is an older vehicle - so I can suggest some typical things which might cause overheating on an older vehicle.
- Thermostat stuck / not working? (typical to change thermostat with a new one during other cooling system service - they get old and stop working properly sometimes. They're not very expensive and it's just worth it to put a new one in - they perform a very important function - so typically just put a new one in.)
[might be able to do yourself - but not sure if that is your problem]
- Radiator Electric Fans not coming on? (controls, wiring, or fan motors broken or not working properly)
[Do they come on when the vehicle gets very hot? Try and check.]
- Time for complete cooling system Flush and Refill ? Ever done? This is important service which many people neglect to ever do - which they say to do every 2 or 3 years on any vehicle. Ensure Heater Core inside the car is also given a separate "flush", and ensure it is refilled with the correct stuff. ( ? distilled water + coolant in the proper mix/strength so it won't freeze given your local temperature conditions)
[Could try and do yourself - but can be a messy job. Typically, best to do when it's still warm out / not going below freezing. Drain, refill with "flush" mix, run for awhile like that, drain again, refill with correct coolant mix for your vehicle. If your vehicle uses water + antifreeze use distilled water or de-ionized water in the final coolant mix]
Typically these things are not easy to do yourself, unless you have knowledge, tools and experience. And the job is a little messy + you are left with old coolant & flush mix that has to be disposed of properly so you don't pollute the environment (hazardous waste).
Take to expert RAD Shop / cooling system specialists. There may be other issues like: bad sensors etc in the cooling system. They may need to troubleshoot and look for any error codes in the car's computer control systems - to help diagnose, find the problem quickly, and fix the correct problems.
Otherwise: Get service manuals yourself - start reading and learning about your specific car's cooling system - and see if you are able to troubleshoot, find the issue, or do anything yourself.
An expert "System Flush" at a Rad Shop with their special machine will do a better job than you can do yourself. If never done, I would recommend that.
Best of luck.

Those particular engines are EXTREMELY sensitive to vacuum leaks. This is also consistent with your P0174 system bank #2 lean. You need to replace your intake gaskets. They are easy to replace yourself, if you plan on doing the job yourself. Has campaign 00M12 been done on your vehicle? If not, the go to your local Ford dealer parts department, order the kit part # YL2Z-9E473-AA. In this kit, you get upper and lower intake gaskets (which are made out of rubber), updated bank #2 timing chain tensioner, oil pressure restricter & oil gallery plug.

Hello good fixya answer seeker

That code basically means the cars coolant temp is under what the thermostat is supposed to keep it at. There are a few things that can cause this issue i shall list them below for you.

1. low coolant level
2. bad thermostat
3. bad coolant temp sensor (sits in the side of the block most of the time)

All of the above are easy to change and cheap first off check the coolant level when car is cold only if that's good change thermostat and gasket cheap and easy if that don't correct the issue change the coolant temp sensor this tells fan when to run and reports temps to Gage.

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it s a long shot, but put the explorer on jack stands start engine, put in neutral GENTLy tap on shift gear on transfer case while someone is pushing handle into high. tap gas to change RPM s while working it. put into drive and do the same but put transfer case into neutral, if goes into neutral stop and put transmission into neutral than put transfer case into high. keep in mind if it works don t take it out, or you will be doing all this again. have had shift cables break have someone shift while you try to change lever position. Might be worth having it checked , transfer case is not a transmission. senser, computer, fuses, solenoid relays are just some easy fixes for this problem..

If you change the tranny oil this video will show you how to change the filter.">

That service visit is an easy one. Change the engine oil, oil filter and lubricate the front end. If you are doing this yourself, add checking differential and trans fluid levels, coolant level and give everything a good looking over for loose parts, leaks and anything else obvious.

If you go to the dealer it will cost you a lot. If you go to an independant it will cost you far less. However, most of the items on a 100k service you can probably do yourself, I would sit down with my owners manual and read over the 100k service, you will be surprised to find it is relatively easy. It would consist of normal things like plugs, wires, oil, oil filter, air filter, fuel filter. Possibly changing the tranny fluid and filter. Possibly flushing the coolant and the brake fluid and basically checking everything over to make sure there are no leaks and everything is functioning properly. If it is recommending a timing belt change I would take it to a tech for that if you dont think you are up to the job, But for the most part you can handle the service yourself and save yourself a bunch of dollars.

GM had a lot of problems with the 4X4 switches they can be changed very easy by popping the trim panel off that goes around the instrument cluster (it just snaps on) and with a little screw driver you can change it yourself

No problem if you did it yourself, but a problem if dealer did it because of e.p.a. regulations. And yes its carossive after time and you might of saved yourself alot of time and money replacing gasgets

explorers do not take dexcool usually the cap shows the coolant used if it shows the coolant in black it is green coolant if it shows yellow it is yellow you should notice that the orange is usually crossed out showing it to not be used