“Overheating”

[USS30147]

My temp gauge started randomly pegging out, turn the truck off and back on a few seconds later and temp back to normal. I replaced both the cht and ect sensors and now it’s showing hot every time you turn the switch on. Does something need to be reset or something?

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[RangerBill]

My temp gauge started randomly pegging out, turn the truck off and back on a few seconds later and temp back to normal. I replaced both the cht and ect sensors and now it’s showing hot every time you turn the switch on. Does something need to be reset or something?

If you still have your old sensors, hook up one at a time to the wiring harness and check your gauge to see if it is reading high. Also, check for DTC codes. The code might point to the sensor or wiring problem location. Were your replacement sensors Ford or aftermarket? Is your coolant level correct?

 

[airline tech]

My temp gauge started randomly pegging out, turn the truck off and back on a few seconds later and temp back to normal. I replaced both the cht and ect sensors and now it’s showing hot every time you turn the switch on. Does something need to be reset or something?

Yes, if the temp gauge pegged out (full hot) the PCM entered - Fail Safe Cooling
This is a programed feature.
You need to hook up a scan tool and will most likely find code
You are going to possibly find:
P1285 or P1299 as these codes will generate the (Pegged-Temp Gauge)
Either CHT or ECT - can trigger these codes.

So most likely the code is locked in - as a perm hard coded and must be cleared with a scan tool. It will not self-reset.
This will clear to code, but the reason for the Overheat needs investigated, so the Live Data Pids needs monitored and the cooling system checked.
Leaks, Low Fluid Levels, T-Stat, Cooling Fan etc. and a Pressure Test.
The Ranger has 2 known leak points with (zero) external leaks.
Head Gasket and the EGR Cooler.

 

[USS30147]

I appreciate y’all, I’ll give these a go when I get time hopefully this weekend. Terrible week for truck issues.

 

[Grandaccess]

Yes, if the temp gauge pegged out (full hot) the PCM entered - Fail Safe Cooling
This is a programed feature.
You need to hook up a scan tool and will most likely find code
You are going to possibly find:
P1285 or P1299 as these codes will generate the (Pegged-Temp Gauge)
Either CHT or ECT - can trigger these codes.

So most likely the code is locked in - as a perm hard coded and must be cleared with a scan tool. It will not self-reset.
This will clear to code, but the reason for the Overheat needs investigated, so the Live Data Pids needs monitored and the cooling system checked.
Leaks, Low Fluid Levels, T-Stat, Cooling Fan etc. and a Pressure Test.
The Ranger has 2 known leak points with (zero) external leaks.
Head Gasket and the EGR Cooler.

Yes, that is what I had to do, even though it did not set the engine light or a code I hit clear and all has been good for two years not, I over heated it when it blew the lower hose

 

[USS30147]

I appreciate y’all, I don’t have a scan tool (yet) but a guy my dad knows came by and reset it and temp is back to normal. I wouldn’t have thought anything would need to be reset without throwing a code. All this new crap with the sensors and what have you makes me want an old bumpside with nothing of the sort. My work schedule is stupid this week so I’ll drive around a while Sunday close to the house to make sure all is good. Again, I appreciate y’all’s Input.

 

[Iwo]

Hello everyone
I own a Ford Ranger 2019 2.0 biturbo 157kw.
I have had it for a year. The problem first appeared three months ago. I drove 300 km without stopping. Suddenly the engine temperature suddenly jumped to max and in 10 seconds it returned to normal. This happened twice more until the end of my 800 km trip. First I wanted to replace the thermostat but the mechanic assured me that it was the water pump. I wanted him to replace everything but he got the wrong thermostat model. On the way back the failure happened again almost in the same place, a slight uphill and again in engine safety mode and a warning about low coolant level (P0217(68) and P2560(68)) I pulled over, I saw that a small amount of water had come out of the expansion tank. After a few minutes I start the car and everything is ok. I continue the trip and again a couple of times until the end of the trip.
After that I went to a Ford service in Germany. According to the diagnosis, the cooling system was set to 3 bar and left overnight, everything was ok. They removed the heaters from the cylinders and checked for leaks, everything was ok. They wrote that there was Co2 in the cooling system. They assured me that the cylinder head should be removed. I asked them if the thermostat should be replaced, they said it was ok.
Last week I bought a thermostat and had it replaced at a local workshop. I'm not sure if they bled the cooling system properly. They said that the car had been running all afternoon in the parking lot and that everything was fine, the car was heating the cabin and it wasn't overheating.
I tried it on a longer distance of 10 km and after a while the heating in the cabin stopped and the car was again showing the same errors p0217 and p2560.
When it cooled down I added about 0.5 l of coolant.
Yesterday before driving I slightly opened the container and air came out, the amount of fluid did not drop significantly. Driving about 15 km at 130 km per hour everything was ok, on the way back the heating in the cabin disappeared again, the mark on the thermometer in the car fell by 2-3 mm and then it started to heat up again and the temperature returned to the middle, I drove about 5-6 km more, to the house. Please give me some advice because I am going crazy.
Has anyone irradiated the system, how and with what, without professional tools.
Is there some other fault?
Thank you for your answer

 

[airline tech]

If you had a shop, find (CO2) via fluid tester at the reservoir and you are ignoring the finding.
Do it again for a conformation.
Bad Head Gasket or EGR Cooler are the highly suspect reason for a (Positive Result)

Due to the (Positive Result) Previously found - The Cooling System CANNOT operate in the proper pressure range - and this is producing the symptoms you have, most likely the pistons are pressurizing the cooling system (Head Gasket) Cylinder Pressure overcoming the Cooling System Pressure and you are seeing the air pockets (on the temp gauge) you will never get the system to bleed (if this is the case) and true.
If this is the same as the (Us Version 2.3) it should be 21 PSI.

Note: Cylinder Pressure is GREATER than the 3 Bar (43 PSI) overnight pressure test, so this provided a possible (no leak found) result, the leak is small enough to hold pressure from the cooling system side- but when driving the cylinder pressure overcomes the cooling system pressure and proceeds to create an imbalance in the cooling system pressure - noted by all the symptoms you have listed.

I know this is not what you wanted to hear - Sorry, but I would perform another (Fluid Test) to confirm the 1st test result.

BTW - Beautiful area - I spent a month on a contract - working out of the Adria Airlines Hangar in Slovenia.

 

[Iwo]

Thank You

 

[Iwo]

I'll try to get back to Croatia and have it tested at the service center there. In Germany they told me 6000-7000 euros and in Croatia 2500-3000. I think the choice is clear.

 

[Iwo]

Here I am again, greetings.
After yesterday's test drive of about 15 km, the temperature jumped again and returned to normal in a few seconds, but before that I was left without heating in the cabin (that's how I know that a malfunction is coming). I continued driving until I exited the highway for another 2 km, the car went into safe mode. Along with the symptoms from before, another malfunction appeared, P2825 - transmission fluid pressure (TFP) solenoid J- control circuit range/performance. The transmission had trouble shifting gears and I barely made it home. After the car cooled down, I opened the expansion tank cap, a lot of air came out but the water level didn't drop more than 2 cm. I tried driving the car, it was ok on a short distance around the house. I think it's time to remove the cylinder head

 

[RangerBill]

Here I am again, greetings.
After yesterday's test drive of about 15 km, the temperature jumped again and returned to normal in a few seconds, but before that I was left without heating in the cabin (that's how I know that a malfunction is coming). I continued driving until I exited the highway for another 2 km, the car went into safe mode. Along with the symptoms from before, another malfunction appeared, P2825 - transmission fluid pressure (TFP) solenoid J- control circuit range/performance. The transmission had trouble shifting gears and I barely made it home. After the car cooled down, I opened the expansion tank cap, a lot of air came out but the water level didn't drop more than 2 cm. I tried driving the car, it was ok on a short distance around the house. I think it's time to remove the cylinder head

With the temperature gauge going to high and coming back to normal with the no heat in the cabin are symptoms of trapped air pockets in the cooling system. The cooling system may need to be bled of air.

 

[airline tech]

Yes, I agree air pockets in the system, but he was previously told bad head gasket, and that is possibly creating the piston compression bleeding over into the cooling system - pushing air into the system - the true way to confirm the finding is to perform another CO2 Fluid Test.
The system will never be able to be bled if the pistons are pushing air into the cooling system, another true sign that the system is being pressurized by the pistons is to run the engine with the reservoir cap off and watch the fluid level suck down and then drive back up to overflow from the top of the reservoir this may be an abrupt action like a geyser.
Again - please verify with fluid test before pulling the head, its most likely a bad head gasket, but if it were me, I would validate the previous finding as a confirmation.

 

[Iwo]

Greetings to everyone
Last week I measured Co2, according to my tester, the test was negative.
Yesterday I recorded a video of what happens to the antifreeze in the container.

 

[Iwo]

antifreeze in the container.

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