Unless you just want to replace them all. The do the same thing on each side of the exhaust system. Also the price is a bit high. Don't forget to stop by an AutoZone near you for a free battery charging and engine diagnostic testing. Depending on the year of your Ford Explorer, you may very well have multiple oxygen sensors.
You might be tempted to do only the front if an engine fault code indicates the problem is the front one, but these are considered normal maintenance items, and you will be doing the rear at some point if you keep the car. Give us the error code and we can go from there. All Replacement brand items are backed by 1-year, unlimited-mileage warranty. The reason is the Engine Computer looks at a lot of different things to compare to know when to set a code. Normally if you have a code for a front O2 sensor you won't have one for the rear sensor on the same side of the car because the computer has nothing to compare it to and it knows it has lost control of the mixture reading in front so it can't expect the gas coming out of the catalytic converter to be right.
The rear is another matter as you can only access it from above. Rear one real slow means the catalytic converter is working. The 1991 and 1992 4. Quality-tested to ensure efficient fuel combustion and helps reduce harmful emissions. Once you have cracked it loose and maybe went through a couple more wrench-arcs, it should turn out by hand. You can get all four if the problems are intermittent and act up at different times, but usually you'll only get one code if they act up at the same time. It's held in place by a hose clamp type strap.
As an example, the computer knows that after the engine has been off at least six hours, the coolant temperature sensor and the intake air temperature sensor had better be reading the same temperature. I was surprised to see that they are very inexpensive. If what you expect out of a vehicle is to spend a smaller amount of money for fuel, or to get there quickly, the Ford Contour is a wonderful model that will meet the goals of you and your family. Learned to drive at 5, and double clutch at 7. Many hand-held code readers will have two or three buttons. Different-sized motors in the Explorers offer a variety of options. Replace it, erase the code s , drive it until the Check Engine light turns on again, then go according to the next code.
I think there are 4. Before starting the job, open the under hood fuse box and pull the 15 amp fuse to the fuel pump. Are you questioning what you were told about two sensors being the same or that there are four altogether? That's why I questioned your intent. A constant perfect mixture at all times is ideal with the old carburetors, but with fuel injection we need to see the changes from rich to lean to verify the Engine Computer has control over that mixture. During the rich pulses the unburned fuel is mixed with that oxygen and burned. Changes in the amount of exhaust gas oxygen result in a voltage change that is monitored by the vehicle's powertrain control module.
Deff look to see if that sensor's wire is laying on the exhaust manifold. Did your mechanic say why all four sensors failed or did he just want to sell you a lot of unneeded parts? I don't recommend the Hayne's manual either - it's pretty confusing. Some V6 and V8 equipped vehicles may have additional upstream and down stream oxygen sensors. Locate the buttons and options on the code reader. The code will point to either bank 1 sensor 1; bank 1 sensor 2; bank 2 sensor 1; bank 2 sensor 2. You can also find other images like ford contour starter location,ford explorer 02 sensor,ford 02 sensor location,ford o2 sensor location,95 ford contour alternator location, and others.
Not only does your Ford Contour oxygen sensor improve and maintain gas mileage, it causes your engine to run more efficiently while producing as little emissions as possible. This gets the fule pressure off the line. We have been searching for this image throughout on line and it came from reliable resource. Follow it down onto the sensor and get the wrench over the sensor nut in such a way that you are going to be able to loosen it. The 3rd bolt attaches the alternator to … a bracket. In that case I would start with just the sensor indicated by the code. I can't remember what size.
If the light is on while driving there will be at least one code, but the problem doesn't necessarily have to be occurring right now. To be specific, my 2000 Durango has 1 upstream oxygen sensor and1 downstream oxygen sensor. Follow the electric … al line one end is a clamp. Do not forget to share and love our reference to help further develop our website. Ford Contour Replacement Oxygen Sensor Information For years Ford has constructed sturdy and rugged vehicles that drivers can count on to get the job done.