Question about 2006 Chevrolet Trailblazer

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Check engine light is on

Mechanic said it was the oxygen sensor ? or something like that. What is that? What does it do ? How much does it cost to replace?

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Typically most vehicles will have to oxygen sensors. The job of the oxygen sensor is to measure the oxygen going into the intake and measure the oxygen from the exhaust. This will tell the computer how well or bad the vehicle is burning your fuel and hence adjust fuel level and other components to keep your vehicle running well. If the computer gave an faulty oxygen sensor, it may be clogged and need replacing. Typically oxygen senors are inexpensive, but due to the location of some of them, troublesome to replace. There is also a special tool you will need, looks like a socket, if you are going to be working in a tight spot. Hope this help you out.

Posted on May 13, 2009

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Put a piece of black tape over the light and forget it

Posted on May 13, 2009

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1 Answer

Engine light blinks once and stays on


Typically, a flashing light is more serious than a solid check-engine light. The flashing light is meant to alert you that you may have a misfire in your engine that will cause catalytic converter damage if you leave the problem unresolved. Replacing a catalytic converter can be costly, so have the engine checked as soon as possible by a certified mechanic.
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