01 Januari 2009

Why Change the O2 (Oxygen Sensor)?

One of the most overlooked maintenance items in your vehicles engine is the Oxygen Sensor (O2). A sluggish or non-working Oxygen Sensor will not set a code or cause the "check engine" light to come on unless it has a short inside.

An aging Oxygen Sensor will cause a reduction in fuel economy and can cost many more dollars in fuel consumption. Just as we age gradually, so does an Oxygen Sensor. Therefore, its decline is not immediately noticed. As the function of the Oxygen Sensor is reduced, it will not read the air to fuel mixture correctly causing a misread of a lean condition and cause the engine to dump more fuel which in turn increases gas consumption and emissions to increase. Additionally, damage to the catalytic converter (CAT converter) can also occur.

If a vehicle has problems with failing emissions tests, it may well be due to the fact that the O2 sensor needs to be replaced. This failing O2 sensor will cause an increase in emitting hydrocarbons and/or carbon monoxide.

Manufacturers recommendations are that the O2 be changed every 60,000 miles. Our recommendations are to use only a factory O2 replacement (OEM). If the vehicle has O2 sensors both in front of the CAT converter and behind, change only those in front of the CAT converter as the one(s) behind are there simply for monitoring purposes.

It is important to have a well functioning O2 so that the new fuel values will be read and received correctly.

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