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Re: O2 sensor when to change Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: O2 sensor when to change, Mark from Toronto, Tue, 14 May 2013 07:24:57 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Bosch basic recommendations are 100K miles but car manufacturers say when the C/E light tells you.
Keep in mind that the car manufacturers are under the gun and promised the devil that the car does not need any emission services. This may or may not be true in most cases and on the other hand Bosch is making money manufacturing and selling sensors.
That said. It is many, many cases by now where a car might not pass smog due to inefficient catalytic converter being too much, HC, too much CO or NOx and that it is cleared up by replacing the front O2 sensor.
Catalytic converters work only by heat and that the fuel mixture goes from lean to rich and back to lean again in a fast pace (10 times per 3 sec).
If the O2 sensor is old and lazy, the catalytic converter gets too saturated with one or the other gas and doesn't clean as well as it should.
Fuel mixture and fuel consumption will also suffer slightly from this lazy switching but not nearly as bad as driving with under inflated tires.
Anders
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