Oxygen is not only crucial for you to breath, but your automobile needs it too. If your engine is surging or hesitating, you could have a problem with your Toyota Celica oxygen sensor. This small device is a part of the exhaust system.

Its job is to measure the proportion of oxygen that exists in the gas in your internal combustion engine. It takes that information and feeds it to the computerized Electronic Control Unit (ECU) which then controls the efficiency of the combustion process.

A fuel that is too rich does not have enough oxygen in it. A fuel that is not rich enough has too much oxygen. Fuel that has an unstable amount of oxygen can cause damage to the catalytic converter and can cause other costly repairs. When the Toyota Celica oxygen sensor is working properly, you get the best possible fuel economy and the smallest amount of exhaust emissions possible. This one part could improve your fuel economy by as much as 12 to 15 percent. Depending on the year that your particular automobile was made determines how frequently the oxygen sensor should be replaced. For those that have an unheated sensor in a vehicle made between 1976 and the early 1990s, it should be replaced every 30,000 to 50,000 miles. For vehicles with a heated sensor made between the mid 1980s and the mid 1990s, change it every 60,000 miles. For heated sensor vehicles made after the mid 1990s, replace it every 100,000 miles.When you replace your Toyota Celica oxygen sensor according to this time table, it will save you money in the long run by saving fuel, and keeping your exhaust system components in working condition.