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Temperature

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Symptoms of a Bad or Failing Evaporator Temperature Sensor (Switch)
Common signs include lack of cold air coming from AC, temperature fluctuations, and the AC compressor not activating.
Is it Safe to Drive With a Fever?
A fever is considered a higher than normal body temperature. A fever can be caused by viruses, bacteria, drugs, toxins, or fungi. Normally a fever comes with other symptoms depending on the type...
How to Replace an Air Cleaner Temperature Sensor
The air cleaner temperature sensor allows the computer to adjust engine timing and air/fuel ratio. A rough idle or "engine lag" are signs of failure.
How to Replace a Cylinder Head Coolant Temperature Sensor
Signs of coolant temperature sensor failures include sluggish acceleration, hard starting, and a Check Engine or Service Engine Soon Light.
How to Replace an Ambient Temperature Sensor
The ambient temperature sensor monitors the car's temperature inside and out. This sensor allows the AC to maintain comfortable cabin temperatures.
How to Replace an Evaporator Temperature Sensor (Switch)
The air conditioning system has an evaporator temperature sensor that fails when there is no cold air or the air conditioning is inconsistent.
What Does the Coolant Temperature Warning Light Mean?
The coolant temperature warning light turns on when your engine is sensed to be too hot and is at risk of damage from overheating.
Symptoms of a Bad or Failing Battery Temperature Sensor
Common signs include engine surging, low battery voltage, and an illuminated Battery Light.
How to Diagnose a Cooling System Problem
You may be driving down the road or sitting at a stop light when you first notice the temperature gauge in your vehicle starting to climb. If you let it go...
How to Replace a Coolant Temperature Sensor
The coolant temperature sensor switch is not working if the engine emits black smoke. The switch may have failed if the car gets poor fuel economy.
How to Replace a Manifold Temperature Sensor
Signs of a failing manifold temperature sensor include rough idling and a rough running engine, and may result in a failed emissions test.
How to Replace a Car Battery Temperature Sensor
The battery has a battery temperature sensor that can fail if the Check Engine Light comes on, the battery voltage is low, or the RPM curve surges.
How to Replace an Exhaust Gas Recirculation (EGR) Temperature Sensor
Exhaust gas recirculation (EGR) temperature sensors monitor the EGR cooler's operation. One is on the exhaust manifold and one is near the EGR valve.
How to Replace the Oil Temperature Sensor on Most Cars
Oil, as well as the oil temperature sensor, is crucial to the engine lubrication system. A bad sensor can lead to leaks and poor vehicle performance.
3 Essential Things to Know About Your Car’s Temperature Gauge
The temperature gauge in your vehicle is designed to measure the temperature of your engine’s coolant. This gauge will tell you if your engine’s coolant is cold, normal, or overheating. It is an important...

Related questions

Question
Temp gauge goes down at 65mph.
Have you had any recent cooling system services done to the vehicle or noticed any leaks? An air bubble in the system from improper bleeding or a fluid leak may be circulating through the system and causing a fluctuation in...
Question
Temperature gauge maxed out
If the temperature gauge is pegged all the time, the problem is electrical. While the issue could be with the gauge or wiring, the most likely cause is a failed temperature sending unit. The sending unit is located to the...
Question
Car gets too hot before the fans come on.
This is a common sign of a faulty coolant temperature relay. This is a relay that monitors the temperature of the coolant and relays this information back to the computer which then uses this information to make many different decisions...
Question
My truck runs till it gets warm then acts like it has no power.
Hi there. It seems that your vehicle has multiple malfunctions that are happening at the same time. The idle air control valve has a fault, evaporative emission system has a large leak, the gear ratio is incorrect, and knock sensor...
Question
P0116 Code. Engine Temperature is high. Do I have air in my system? Water Pump issues?
Hi there. Check the thermostat by watching the coolant temperature gauge. When the engine gets hot and the thermostat opens up, then needle moves down a little bit. If the needle does not move and the system seems to be...
Question
My vehicle is overheating and the overheating light comes on. What could that be?
Hi there. If the engine is overheating and the light is coming on, then either the engine is overheating from a faulty thermostat, water pump, or burned head gasket, or the coolant temperature sensor is not working properly. Check the...
Question
I am having issues with the defroster blowing cold air on the driver side
Hi there. There is a blend door issue on your ducting to your heating and air conditioning system. Check all of the blend doors and make sure that they are working. The blend door that is not working properly can...
Question
Possible car overheating
This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a faulty temperature sensor. The temperature sensor relays the temperature of the coolant to the car's computer that uses this information for...
Question
Car overheating/fluctuating on temperature.
Hello, thank you for writing in. There are several other components that can cause a malfunction with the cooling system. You are in the right realm of thinking however, and there is likely a bad circulation of coolant or air...
Question
My hot temperature light is blinking and the temperature is below the C mark. Is it safe to drive home?
Hi there. The coolant temperature sending unit is malfunctioning and sending the vehicle the wrong information or the gauge on the dash has failed. The sending unit could have burned inside causing the computer to think that the engine is...
Question
Can you tell me if my transmission is running too hot. 2014 Jeep Grand Cherokee
Hi there. The transmission temperature that you are referring to is normal. The transmission on this vehicle does run slightly higher than the cooling system temperature. Most of the time it should run about 210-220. If you want to get...
Question
Yes I have 1973 Chevy dump truck the temperature connecter coming from electric thermostat melted all the way to my dash.
Hi there. Check the temperature sensor on the engine. If the wiring melted off, then the sensor has caused a short to ground on or near the wire. This will heat up the wire and make it burn. If the...
Question
Temperature gauge does not work - 1998 Mercury Grand Marquis
You will need to test the computer to scan for data of the temperature sensor to see if the computer is reading the correct temperature as tested externally on the coolant sensor. If the sensor is not accurate then replace...
Question
About every 2-3 weeks the car will just stall, usually when stopped or slowing down. What is wrong?
This may be related to a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at...
Question
Temperature gauge
It sounds like you may have a faulty temperature gauge or a faulty temperature sensor. As you may know, there is a sensor that measures the temperature of the coolant that relays this information to the computer which then sends...
Question
My truck is bucking at different speeds but it smooths out during acceleration.
Hi there. Check the contacts to the engine oil temperature sensor. See if the contacts are loose and if they are falling off. Also, check the wiring to the sensor and see if its over a spark plug wire. Its...
Question
car temperature drops while driving and doesn't warm back up, then if I turn the car of it won't immediately restart.
Hello, thank you for writing in. Due to the recent repairs that have been done, you need to have them verified. If the thermostat was installed improperly, or the system was damaged before or during, then you may have these...
Question
Is it possible to crack an engine block by flushing the radiator?
Hi there: Is it possible - certainly. If the engine block is hot and the coolant being flushed is cold, it's actually rather simple for small cracks to develop inside the water passageways. It really depends on the condition of...
Question
Won't crank after being driven, have to cool down first then it will crank
Hi there: There are several reasons why your 1996 Dodge Ram might not start when the engine is hot. Some of the common issues include a reduction of volume produced by the fuel pump, spark plugs that are damaged, ignition...
Question
Just drained/replaced coolant and now the temp gauge doesn't work
Some vehicles have air purge points that must be opened when coolant is re-filled. If you don't open the purge points to force the air out as you add coolant in, air can get trapped in cooling passageways and that...

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