When to replace a coolant temperature sensor on a car?
A corroded coolant temperature sensor will give an incorrect reading. It is, therefore, important to replace the coolant temperature sensor as soon as it shows signs of corrosion. Allow the engine to cool down so that you do not get burned. Place a catch pan under the radiator once you can touch the engine.
Where is the coolant temperature sensor on a Volkswagen?
The coolant temperature sensor is a common part that sometimes requires replacement on a Volkswagen. The coolant temperature sensor is exposed to the coolant flow inside the vehicle’s engine block or engine cylinder head, or both.
Why is the coolant sensor important to the PCM?
The coolant sensor keeps the PCM informed about the temperature of the coolant inside the engine. This is vital information for the PCM because many control functions vary with temperature.
Can a broken coolant sensor starve the engine?
A permanently open (broken circuit) coolant sensor will starve the engine of fuel. Luckily, this is a simple repair on most vehicle models. You can replace a bad CTS in your car following a few simple guidelines and precautions.
When your coolant temperature sensor should be replaced?
Often, the engine coolant temperature sensor must be replaced at about 100,000 miles. If you don’t properly maintain the engine cooling system, the sensor could fail much earlier. If that happens, the check engine light will come on, and then a service technician will use a diagnostic scan tool to determine the problem.
What are the symptoms of a bad coolant sensor?
Common symptoms of a bad engine coolant sensors are overheating, hard starting conditions, poor idle, check engine light ON and the electric fans do not work properly. The easiest way is to read the trouble code memory and check the value from the sensor, to make sure it’s a possible value.
How do I change the coolant temp sensor?
Part 2 of 3: Remove and replace the coolant temperature sensor Make sure vehicle is on a level working area. Locate the coolant temperature sensor. The first item that needs to be completed after you compiled all of your tools and assets is to locate the coolant temperature Jack the front end for clearance. Remove radiator cap and overflow cap. Drain the radiator. Replace drain plug.
What does a bad coolant sensor do?
A failing coolant temperature sensor will prevent a vehicle’s engine from entering a closed loop. This will cause the vehicle to run rich meaning the engine’s fuel mixture will have a higher percentage of fuel to air which will result in diminished fuel economy.
A corroded coolant temperature sensor will give an incorrect reading. It is, therefore, important to replace the coolant temperature sensor as soon as it shows signs of corrosion. Allow the engine to cool down so that you do not get burned. Place a catch pan under the radiator once you can touch the engine.
What should coolant temp be when engine is hot?
With a good OBD2 code reader, you can also check the live data and the parameters of the CTS sensor. Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm.
How do you remove a coolant sensor from a radiator?
2. Place a clean drain pan under the radiator, open the radiator valve and drain about two to three quarts of coolant (or just enough to drop the level below the sensor). Then close the drain valve. This will minimize coolant waste when you remove the CT sensor. 3. Locate the CT sensor.
A permanently open (broken circuit) coolant sensor will starve the engine of fuel. Luckily, this is a simple repair on most vehicle models. You can replace a bad CTS in your car following a few simple guidelines and precautions.