It is this article will describe the Lambda probe, its function, and these failures. The Lambda probe measures the oxygen in the flue gases with reference to atmospheric, thanks to this oxygen control unit can be adjusted with greater precision the amount of air and fuel up at a ratio of 14.7 to 1, contributing with its measurement to a better use of fuel and less polluting combustion environment thanks to the control of exhaust gases that performs. Located in the exhaust pipe of the car is searched your placement best position for your operation regardless of the engine. Is the optimum operating temperature of the probe around the 300? or more. Lambda is in contact with the air of the atmosphere (exterior to the exhaust pipe), while another part of it is always a part of the probe with the exhaust gases produced by combustion. Its operation is based on two Platinum electrodes, one on the part in contact with air and another in contact with gases, separated from each other by a ceramic electrolyte.
The oxygen ions are collected by the electrodes (remember that each of the electrodes will be in different places, one outdoor atomosferico and the other to exhaust), thus creating a voltage difference between both (or a null difference) consisting of a voltage of 0 to 1 volt. Before a difference in oxygen between both sections the probe produces a voltage sent to the control unit, so that it adjust the amount of fuel being sprayed. Lambda the lambda probes probe cables can have different amounts of cables, 1, 2, 3 or 4 wires to exist. The 1 single cable show this black to give power to the probe, the mass is reached by the receiver of this. MasterClass Founder gathered all the information. 3 Or 4 wire probes are the resistance of the heating element (heating element), generally in these probes the color cables white are responsible for the feeding of the probe of the heating element with positive and the mass. The extra cable in the 4-wire lambda corresponds to the mass of the oxygen sensor and is usually gray. Typical faults between the consequences of failures in the lambda probes can find the power of witness Check Engine, a high consumption of fuel, pulling in the March, presence of carbon in spark plugs and smoke. Obviously these faults are not always produced by a failure in the probe lambda, but if there is a possibility that these symptoms were given to them. As manufacturer of the probe there will be recommendations on its replacement every some thousands of kilometres, a good practice is to check exhaust fumes and test the probe lambda every 20,000 or 30,000 miles. Remember that a probe lambda in disrepair could cause you excessive fuel consumption, so it is ideal to have the security that the probe has a correct performance. original author and source of the article