1991 Ford Van Rough Idle Temperature Guage Reads Hot

An engine coolant temperature sensor is essential for the optimal functioning of your car. The engine coolant temperature sensor'due south job is to measure the coolant temperature for the engine control module.

With this information, the engine control module adjusts the air-fuel mixture depending on the temperature.

Like every other component, the ECT sensor can as well get damaged, resulting in several engine-related problems. Hence, it is advised to have your auto inspected right away to avoid any serious problems.

This article will discuss the almost mutual symptoms, location, replacement cost, and how to diagnose it. Let's take a quick wait at the signs:

The about mutual symptom of a bad coolant temperature sensor is a check engine low-cal on your dashboard. You tin too find signs like higher fuel consumption than usual or not-working radiator fans, causing the engine to overheat at idle.

While these signs in a higher place are the most common ones, it'south are not all of them. Here is a more detailed list of the mutual symptoms of a bad coolant temperature sensor.

Bad Coolant Temperature Sensor Symptoms

ane. Check Engine Light

One of the commencement signs of all coolant temperature sensor symptoms you will probably notice is that the check engine calorie-free will evidence upwardly on your dashboard.

If the computer detects whatsoever problem with the sensor's circuit, it volition illuminate the check engine light, indicating that the automobile needs an inspection.

If you see a cheque engine low-cal on your dashboard, it is time to check the trouble codes with an OBD2 scanner.

2. Poor Mileage

A faulty ECT sensor can send a false signal to the onboard reckoner, resulting in an incorrectair-fuel mixture. For case, a faulty sensor tin send a indicate indicating the engine is cold when it is not, and more fuel will estrus the engine quickly.

This will cause the fuel economic system to driblet and decrease the engine's performance.

3. Electric Cooling Fans not coming on

Some cars use the engine coolant temperature sensor to control the electric cooling fans. You accept two separate temperature sensors for the fans, dashboard gauge, and engine management in near cars.

All the same, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans won't start at all.

four. Black Smoke from the Frazzle Pipe

Due to an incorrect engine temperature point, the ECU may enrich the fuel mixture to a bespeak where the combustion procedure becomes hard.

The excessive fuel volition burn in the exhaust pipe and volition produce thick blackness fume.

5. Difficult Starting Condition

The starting moment of a motorcar is very critical with the amount of fuel getting injected into the engine. If the air-fuel mixture is faulty, you lot might find your machine difficult or impossible to start.

half-dozen. Engine Overheats

The cooling fan, which is backside the radiator grille, removes heat from the engine'south coolant. This fan is electrically controlled and relies on the signal from the onboard computer.

If the fan receives a simulated signal, the fan might not plough on, causing the engine to overheat. Some vehicles have a separate coolant temperature sensor for the fan, simply many cars utilize the aforementioned sensor.

seven. Poor Idling

Due to a faulty ECT sensor, the fuel mixture will adjust. This will cause the engine tovibrate or shake when the motorcar is at low speed and lead to other ability losses and strange behaviours.

The engine is very sensitive to wrong air-fuel mixtures at idle and this is a status when yous might notice that something is wrong with your engine coolant temperature sensor.

8. Poor Engine performance

The engine coolant temperature sensor can take a hard affect on the air-fuel mixture. A bad air-fuel mixture can likewise cause the engine operation to drop drastically.

If you lot feel that the engine performance is not what it has been before, it may be due to a faulty engine coolant temperature sensor.

What is a Engine Coolant Temperature Sensor?

Coolant temperature sensors are likewise known every bit engine coolant temperature sensors or ECT sensors. The principle working of this sensor involves the employ of an electric resistance that measures the temperature of the coolant. These measurements produce essential data for the engine system of your vehicle.

The readings produced from the coolant temperature sensor are transmitted to the engine control unit, where they are utilized every bit data for regulating and maintaining the proper ignition time and the optimal fuel injection through the computerized approach.

RELATED: 7 Causes Why Machine Temperature Gauge Stays on Cold

Coolant Temperature Sensor Location

The engine coolant temperature sensor is commonly located on the engine block or cylinder caput. It is often installed on a plastic hose on the coolant'due south inlet.

Dissimilar brands and car manufacturers take different means of placing the coolant temperature sensor depending on the car blueprint.

Some vehicles may have more than one temperature sensor, equally sometimes different sensors are used to bespeak to the dashboard, cooling fan command, and the control unit of your engine system.

With ii sensors, nosotros usually consider sending signals to the control unit equally the coolant temperature sensor.

Coolant Temperature Sensor Replacement Cost

The average coolant temperature sensor replacement toll is betwixt $50 and $250, depending on the car model and labor costs. A coolant temperature sensor costs $30 to $100, and the labor costs $xx to $150.

The coolant temperature sensor itself is oftentimes quite cheap and you can ofttimes find them around $40 for a quality i. There are cheaper ones on the market, just I heavily recommend buying a quality one like Bosch to skip the headaches.

The replacement is often also quite straightforward, except that you might have to pour out all coolant from the engine and refill it – which means that you have to remove all air from the coolant system, which can be difficult.

However, if you are fast replacing the sensor, at that place is frequently no need to tap out the coolant, but this requires some skills.

Call up to always brand certain the coolant temperature is depression when doing this kind of work!!

How to Diagnose a Faulty Engine Coolant Temperature Sensor?

To diagnose the coolant temperature sensor, you lot need a repair manual for your car model to find what measurement values you should expect from the coolant temperature sensor.

Connect an OBD2 Scanner and expect for related problem codes. Cheque the live information to come across the temperature from the sensor. If it is mode off the range, check the wirings, and replace the sensor.
Locate the coolant temperature sensor in your vehicle by referring to the service manual.
Find the coolant temperature sensor and remove the connector plugs.
If you have two pins on the coolant temperature sensor, you can try ohm measure between these two pins.
Bank check your repair manual for the correct ohm-value at a given temperature.
If the value is wrong – replace the sensor.
If it seems fine, check the wirings and connectors between the coolant temperature sensor and the engine control module.

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Source: https://mechanicbase.com/coolant/engine-coolant-temperature-sensor-symptoms/