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Oxygen Sensors

Automotive Oxygen Sensors


There are many components to the 12 volt fuel pump, with each part having its own set of functions. The fuel tank is one of the most important and most visible parts of the assembly and it is usually located at the opposite end of the engine. A fuel pump is needed for drawing gas from the tank to the engine. Your car may have two types of fuel pumps. The first type is the mechanical fuel pump that was designed for cars with carburetors. And, the second one is the electric fuel pump that is used in vehicles having an electronic fuel injection.

The oxygen sensor is needed for adjusting the ratio of the air fuel in the combustion engine. This is done by sending a particular voltage to the ECM or the electronic control module. There are many other sensors in place for sending signals to the ECM. These different sensors are working together to be able to manage the emission control system efficiently. The sensor is very important for reducing the car's air fuel ratio.

The Americans started to use oxygen sensors in their cars in the year 1980s. The first versions of the sensors only had very simple designs. Only a single wire was attached for transmitting the voltage needed to be sent. This kind of sensor was known as the unheated type. However, the newer versions were better equipped. They have their own heaters and there were three wires used for transmitting voltage. The car should be warmed up in the former versions so that the unheated sensor would work properly; however, this is no longer necessary for the newer versions. They have better gas mileage and the exhausts gases were reduced in a more efficient manner. The newer models now have better sensing devices incorporated in them.

The sensor in your car can fail because of the soot that has been accumulated. Because of this, the second sensor won't last as long as the first. This is also caused by the engine part wear and the dirt that has been accumulated. The mileage can drastically reduce to 20% less if you have a bad sensor for oxygen. But, this will have to depend on the driving and vehicle condition as well.

In most cars, you will be able to recognize if there is a failure in the sensor for oxygen through the engine light because it will light up. But, in old car models you will not see this because the light could be burned out. And if you have just purchased a used car, well probably the previous owner has disconnected the light. So if you ask for a tune up of your car, then you should have the mechanic check the sensor.

When you do this in the newer models of cars, it won't be a problem since you'll just simply plug this to the ECM so that you will get a report about the condition of the oxygen sensor. With modern cars, the engine light will just work and the ECM will tell you whether the sensor is working or not. But this cannot be relied on in older cars. If you wish to check the problem yourself, you may refer to your car manual so that you will know the steps in checking the sensor.

If you will be replacing the sensor all by yourself, then you should purchase a market sensor with an excellent brand name. You should not buy one that is quite cheap. There are lots of companies that offer good sensors and they can fit your car best. There are also products that may look good at first sight but after going 5000 to 7000 miles, they suddenly fail. Also, reliable companies are willing to provide product warranties.

So how do you go about replacing the oxygen sensor? When your sensor has gone faulty and needs replacement, then you can do it on your own. There are many mechanics that name this as the DIY method. You will just need some simple tools to carry out the procedure. The following tools you require are adjustable crescent wrench, new piece of sensor and a flat tip screw driver.

In the process of removing the sensor, what you should know is this process is not the same for all vehicles. Along the procedure, there are also many other things that you should remove or replace. But, this article will detail the general method of how the process should be done. First, you have to know where the sensor is. In many vehicles, the sensor is located in the exhaust. A front wheel drive engine's sensor is at the front part when you open the car's hood. But, in a rear wheel drive engine, you can locate the sensor just at the bottom of the donut gasket.

Next in the process is removing the sensor. Take a closer look of the sensor first and study the wiring harness to know how you can remove this. You can do so by pulling the device somewhere. It will be easier if you take the wiring harness out. Just simply get your adjustable crescent wrench so that you can start unscrewing the sensor in the exhaust. It would also help if you make use of a lubricant so that the seal can be easily loosened.

After this one, you can grab your new sensor. This will be a weird step since putting the new sensor will require you to connect the wiring already. Turn the sensor until the wiring has already been bound. Then tighten it in its place. You may take several tries in the process but don't forget that you can always do it. Other reminders that you have to remember when you replace the oxygen sensor are to ensure that the engine is cold; you need goggles and gloves as well. These will keep your fingers and eyes protected. Usually, you will see many debris and rust around your engine's exhaust and they can be uncomfortable in your eyes. Also, don't forget that you should not force things. The part should perfectly fit, so if you are having a problem with it, then you should not force it to avoid more trouble.