What happens if I unplug the coolant temperature sensor?
What Happens If You Unplug The Coolant Temp Sensor? Unplugging the engine coolant sensor while the car is running will likely cause the engine to stumble and run rough. Unplugging the engine coolant temperature sensor before starting the engine may result in a no start, especially likely on a cold morning.
How do you disconnect a temperature sensor?
- With the engine and coolant entirely cooled down, disconnect the battery.
- Remove any plastic engine covers.
- Locate the coolant temp sensor.
- Partially drain the cooling system, or perform a coolant flush, if it is due.
- Disconnect the electrical connector from the sensor by pushing on the tab and pulling the connector.
Will a bad coolant temperature sensor cause a misfire?
The coolant temperature sensor can also fail in a manner that causes it to send a permanently hot signal. This can cause the computer to incorrectly compensate for a lean signal, which can result in overheating, and even misfires or engine ping.
How long does it take to change a temperature sensor?
The actual process of replacing the coolant temperature sensor is extremely simple. However, the difficult work comes in the preparation of the cooling system – both before and after. Tip: This job should only be completed when the engine is cold and has not been running for a minimum of one hour.
Why do the fans come on when I Disconnect The Temp sensor?
Since the fans turn on when the temp sensor is disconnected, it can’t be a fan relay. It must be the 2 wire temp sensor or the ECU. Most likely the temp sensor since when it’s disconnected, the ECU turns the fans on.
What happens when I unplug the temperature sensor?
The fan still inst working, however if I unplug the temperature sensor the fan works from start up. The fan also works when the A/C is on. What could be the problem? have the same problem? Fan will default to on with no signal from the sensor, the only other item would be the fan control module.
What to do if your coolant temperature sensor is bad?
The coolant temperature sensor is one of the most important engine management sensors, as its reading plays a key role in calculations which affect engine performance. For this reason, if you suspect that your coolant temperature sensor is having an issue, have the vehicle inspected by a professional technician from YourMechanic.
How does the temperature sensor work on a radiator fan?
I would do some testing though just to be sure. It is a simple system as cooling fans go. The ECT sensor tell the PCM the temperature, at 209 degrees the PCM sends a pulsed power signal to the fan control module. That signal keeps getting faster as the temperature rises.