BMW Repair Questions? Ask a Mechanic for Answers ASAP
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Dear customer, the oxygen sensor is responsible for measuring the air-fuel mixture in the cylinders at the time of combustion when the error code concerning the oxygen sensor lights up, it is often not that the sensor is defective but that the sensor is detecting an erroneous mixture in the cylinders, this mixture must be estequeometrica osea equal quantity of fuel with equal quantity of air when to a difference in some of the two the sensor is activated and the error code indicates a rich mixture this speaking to you that there is an excess of fuels, if on the contrary it indicates a poor mixture this speaking to you what there is more air than fuel, according to the error code we have to verify making the limpiezas to the injection system or cleaning to the system of admission of air.