What happens when a coolant temperature sensor goes bad?
If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. This will reduce fuel economy, and may hinder engine performance.
Can you drive a car with a bad coolant temperature sensor?
It is possible to drive a vehicle with a faulty coolant temperature sensor as the management system defaults to a static reading. A vehicle’s coolant sensor is a critical component used by the engine management system. It directly affects, cooling and fueling of the engine and therefore affects how the engine performs.
Can a coolant temp sensor cause starting problems?
Bad coolant temperature sensor causes cold starting problems If you have to pump the gas pedal in the morning to keep your car running, you may have a bad engine coolant temperature sensor. You can have a bad sensor even without a “check engine” light or trouble code.
What is the coolant temperature sensor on a VW Jetta?
Unfortunately, the coolant temperature sensor (CTS), or an Engine Coolant Temperature (ECT) sensor, is a very common Volkswagen MK4 Jetta problem that can lead to serious engine issues. The CTS is a sensor that monitors the temperature of your engine’s coolant, which gives a signal of how hot your engine is running.
What are the symptoms of a bad coolant temperature sensor?
Here is a more detailed list of the common symptoms of a bad coolant temperature sensor. One of the first symptoms you will notice is that the check engine light will activate. If the computer detects any problem with the sensor’s circuit, it will illuminate the check engine light, indicating that the car needs an inspection.
What’s the problem with my VW Jetta engine?
Coolant Temperature Sensor Failure Unfortunately, the coolant temperature sensor (CTS), or an Engine Coolant Temperature (ECT) sensor, is a very common Volkswagen MK4 Jetta problem that can lead to serious engine issues.
Why does the temperature light go off on a VW?
VW temperature light comes up at the cold start but goes away after a restart. You most likely have a low engine coolant level. After the engine is started and the coolant warms up, the coolant level on the reservoir can rise enough to turn off the temperature light.