Question about 2011 Ford Ranger

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Thermostat reset Engine light is on. Had it hooked to tester by autozone. It says there are 3 possible issues: 1. Not enough coolant ( not the problem, already checked) 2. Thermostat. 3. Thermostat sensor The truck is not overheating. I have heat, but the gauge does not go past 1/4 cool. Any help is appreciated

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  • Expert
  • 216 Answers

Sounds like the thermostat is broken or stuck open. If the thermostat is good it is possible the the engine coolant temp sensor is bad.

Posted on Oct 23, 2013

Testimonial: "Tod, would you replace the thermostat first then the sensor?"

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

keemo68
  • 1263 Answers

SOURCE: 96 Ford truck engine lIght will not go away.

this is the problem with code readers they bwill tell you the code and sometimes even have a reset feature. However they do not tell you the parameters and don't have an drivability feature so you can not test the ecm and all the sensors or modules while engine is running. diagnostic scan tools are very expensive and hard to use unless you have been trained to do so and PEP BOYs is not what I call real reliable mechanics to begin with. Now I concure with toddG on his reasoning in what might be the potential fault. if your vehicle is running rich or lean your O2 sensor will pick this up on the exaust side, however it is not the sole sensor responsible for the ecm adjusting the fuel air mixture.. you stated that you have switched out several o2 sensors and the fuel pressure regulator, but there is also you mass air flow sensor, your TPS sensor, as well as your map sensor these are worth checking out and just because a faulty sensor is the problem doesn't mean you will get a code each time. the system is built with redundancy in order to keep the vehicle running. in order to get the best possible diagnois take it to a shop where they have a full diagnostic scanner this will have not only OBD1 and OBD2 but cam protocol as well. while the tech is scanning the vehicle he will be able to see how the engine is performing under realtime conditions. please rate this as well as change the rating for toddg because he did offer a valid suggestion

Posted on Oct 02, 2008

the terrier
  • 94 Answers

SOURCE: 92 Mustang Engine WIll Not Heat

reggie, living in the uk, i having never worked on a mustang, but have found this problem on many cars, two thing i can mention here, 1st is the heater matrix (small radiator thingy usually located in front of the fan behind the dashboard)being blocked by limescale or 2nd the stem of your warm cold dial no longer keying with the valve that changes from cold to hot. Since the themostat problem has been address try looking closer at these 2

Posted on Oct 24, 2008

  • 840 Answers

SOURCE: Escort check engine light - code = P0125

this is whats going on insufficient warm up time / low engine coolant /check coolant/ leaking or stuck thermostat or faulty tep sensor

Posted on Jan 25, 2009

  • 1 Answer

SOURCE: ford ranger truck overheating

I have had this happen with my ranger. Changed everything I could to try to fix the over heating. It turned out that I had a small leak in my head gasket and it was allowing exsaust gas to go into the cooling system witch was over pressurizing it. Also the air from the exsaust will heat up much faster than liquid making your thermostat to read hot and will not be able to blow hot air in the cab because there is no liquid going to the heater core. This happened to me when my blet came off and I tryed to make it home. If you had it over heat for a long peirod of time it may have ripped the head gasket.

Posted on Feb 21, 2009

wyatt1582
  • 453 Answers

SOURCE: 2001 ford taurus with check engine light on. code

Make sure you replaced the right one there are two sensor's for the coolant, one takes coolant temp and the other one runs the fans for the radiator. Both are located on drivers side of the block. 2 wire leads on each how ever both are different in sending readings to the computer.Both look just alike also. Just make sure you replaced the right one. Or replace both.

Posted on Sep 15, 2009

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1 Answer

Heater produce cold air


This could be the result of a number of issues, we'll go from least expensive to most. 1) replace your thermostat on the rad. 2) check your coolant level and make sure it is also good i.e. use a tester to measure its temperature range. 3) after the engine has been running for a while, are the upper and lower rad hoses approx. the same temperature to the touch? This is an '05, it is also possible that the heater core is shot.

Oct 17, 2015 | 2005 Honda Civic

1 Answer

TEMPERATURE GAUGE READING HOT ON 1999 FORD TAURUS WHEN DRIVING HIGH SPEEDS


get test tool called a block tester (a free loner tool from Autozone) the test fluid for tester is about $8.00 us open hood on your car make sure fluid in coolent resivour is about 3 inches low so u dont get coolent in tester. run car at high speed till it is hot be careful opening resivovr that u dont burn yourself. put blue fluid in tester,put tester in resivour sealing it as best as possible squeeze bulb for up to 2 minutes sucking only air. if fluid turnes yellow you have a head gasket leek. they dont always blow white smoke.but may if you drive them long enough. if this is helpful please leave me great feed back.

Feb 18, 2013 | 1999 Ford Taurus

1 Answer

I have a 1992 buick lesabre and my heat stopped blowing and when I'm just sitting the heat get warm in car but when I'm driving the heat is cold


Many things. Could be bad thermostat. Head gasket out. Fan/blower relay bad/defective. Not enough antifreeze in cooling system. Check antifreeze for level and strength ith tester. Have to take radiator cap off first, but do it when vehicle is cold. Do you know how to change a thermostat? don't attempt if never done before. Pressure test cooling system or take to autozone/advance auto/o'riellys to have pressure tested. This will tell if your head gasket is blown. You can buy a cheap 5-ball antifreeze tester and check the coolant condition. One more solutions. Coolant system may have to be burped. Possible vapor lock in coolant system if antifreeze change recently and not burped properly.

Jan 16, 2013 | Cars & Trucks

2 Answers

I have a problem on my chevrolet the check engine light on and the code is p0010 p0128 and p0641 thank you.


Causes A code P0010 may mean that one or more of the following has happened:
  • Faulty oil control valve (OCV)
  • Open or short in the VVT/VCT circuit
  • Open or short in the OCV / solenoid valve
  • Damaged computer (PCM)
Possible Solutions Some recommended troubleshooting and repair steps are:
  • Carefully inspect the Bank 1 VVT/VCT system circuit wiring and connectors, repair as required
  • With a warm engine, test the operation of the OCV, replace/repair as needed

A code P0128 may mean that one or more of the following has happened:
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty cooling fan (running too much)
  • Faulty coolant temperature sensor ECT
  • Faulty intake air temperature (IAT) sensor
Possible Solutions Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:
  • Verify coolant strength & level
  • Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
  • Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
  • Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
  • If the above items check out good, replace the thermostat
P0641 is a generic code for a possible bad ECU. I would first fix the other two issues and then clear the check engine light and see if it comes back on. If it does, then you have a possible bad ECU and will need to run further tests to see if that is the case or not

Jun 30, 2011 | 2006 Chevrolet Cobalt

1 Answer

The engine light came on and a code reader states "Coolant thermostat - coolant temperature below thermostat regulating temperature". I assume the thermostat is bad. Can you provide details on...


I read that as telling you the coolant temperature is not high enough to open the thermostat, thus if you replace it the new one will not open either as the coolant has to be warm enough to open it. If the heater/defroster is working I think your thermostat is working fine. I think perhaps another analyzer should be utilized before you start taking things apart. The diagnostic testers at the dealer cost in the thousands, the ones at autozone cost about 40 bucks. And it helps so much to have someone who has seen this before do the testing as opposed to someone who was making pizza last week.

repair manuals on CD cost about 10 bucks on eBay and car repair videos aplenty are there for free on www.youtube.com.

Feb 15, 2011 | 2005 Chrysler 300

1 Answer

My check engine light is on, and today my temperature gauge stopped working and we have replaced the engine coolant sensor and the connector and temperature gauge still not working. PLEASE HELP


Could be the thermostat. I know nothing about cars but I noticed my 2000 Grand Prix temp gauge was not going to the normal level. My wife drives this car so I didn't notice it for a month or so. Eventually the Engine light came on. Took it to Autozone and the code came back as P0180... (1) low coolant (2) bad thermostat (3) enginge fuel temp sensor. They used a code reader that was about the size of an Ipod nano.

Coolant was okay, so took it to my mechanic. His netbook sized computer showed it was the Thermostat. He reset the codes and the temp guage went back to normal. Was short on $40 for the fix at the time, so I parked the car and promised to bring it back in 3 days. Went out and checked the car a day later at 25 degrees outside without starting the car... gauge still sitting at the normal level. No question it's the thermostat. That car will not be driven again until T.stat is fixed in 2 days.

Oct 18, 2010 | 2004 Pontiac Grand Prix

1 Answer

How to change the thermostat


For 1999 Oldsmobile Aurora 4.0L SFI DOHC 8cyl check thie how to replace a Thermostat:

Parts:
1. Thermostat

Tools:
1. 3/8 in. Drive Ratchet
2. Needle Nose Pliers
3. Screwdriver
4. Cooling System Pressure Tester
5. Socket Set
6. Radiator Hook Tool

Steps:
Step 1 Open the hood and locate the vehicle’s radiator.
o Tip: Make sure the vehicle has cooled down before inspection.
o Tip: Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or safety shoes.


Step 2 Remove the vehicle’s radiator cap and use a radiator pressure tester to check for leaks.

Step 3 Drain out some of the engine coolant in the radiator so the coolant level is below the thermostat housing to prevent leaking when replacing the thermostat.

Step 4 If necessary, remove the upper radiator hose.
o Tip: A twisting motion may help to initially break the upper radiator hose loose. You can also use a flathead screwdriver to help pry the hose off. Make sure not to damage the hose.

Step 5 Remove the thermostat housing bolts.

Step 6 Remove the thermostat housing.

Step 7 Remove the thermostat.
o Tip: Make sure to note the way the thermostat is installed. Installing the thermostat backwards will affect how the cooling system performs.

Step 8 Clean the mounting surfaces. Install the new thermostat as it was removed and always use a new thermostat gasket.

Step 9 Reinstall thermostat housing and tighten mounting bolts evenly. If applicable, reconnect the upper radiator hose.

Step 10 Refill the cooling system with coolant.

Step 11 Start the vehicle with the radiator cap off and allow the engine to run for several minutes. This allows the air bubbles to escape the cooling system.

Step 12 Reinstall the radiator cap.

Step 13 Run the engine until up to normal operating temperature. Remember to keep an eye on the temperature gauge to prevent overheating.


Hope helps (remember rated)

May 31, 2010 | 1999 Oldsmobile Aurora

2 Answers

Hi my rangerover heater is blowing out cold, everything else is working just the heater isnt...


Most likely your thermostat has failed and is stuck open. Engine coolant goes through the heater core and is used to heat the air that is blown into the cabin. If the thermostat fails, the coolant doesn't stay inside the engine long enough to absorb enough heat to make the climate control air blow hot. Change your thermostat (flush the coolant and have it replaced while you do this), and you should be back in business.

Nov 08, 2009 | 1999 Land Rover Range Rover

4 Answers

Heater blows cold air


first check your antifreeze level.

Oct 12, 2009 | 1999 Lincoln Continental

2 Answers

Engine coolant temperature is lower than thermostat


This happens when the Engine Coolant Temperature (ECT) does not reach 75°C (167°F) despite sufficient engine warm-up time.

This happens usually when the thermostat/temperature sensor is faulty, and is bad for emissions and fuel consumption.

The repair cost may vary, even if themperature sensor is not an expensive part, after replacing the sensor there is need to reset the ECU (car computer module).

Nov 23, 2008 | 2001 Pontiac Grand Prix

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