How to check the oxygen sensor – lambda sensor

How to check the oxygen sensor – lambda sensor In the category Automotive Car Repair Many people are interested in knowledge and learning about many subjects, this knowledge may be vital at some point in your life, attention enough, and dive into more detail more articles and learn more information about How to check the oxygen sensor – lambda sensor.

How to check the oxygen sensor – lambda sensor – Before you replace the oxygen sensor , you must make sure that he is the cause of malfunction Engine failures during acceleration, loss of power , increased fuel ,  making engine.

To do this, we need to check the oxygen sensor .

List of possible malfunctions lambda probe ( oxygen sensor )
broken – heating
– loss of sensitivity – reduction of speed ( how to repair the sensor ( restore sensitivity) ?)
Typically , death often wear on the car is not fixed , if the cause is in the sensor sensitivity . But if there was an open circuit heating sensor , on-board computer that instantly give you an error.

Checking the power sensor ( oxygen sensor voltage )

Before you replace the sensor, you need to make sure that it is receiving power and all circuits are intact . To do this, open the hood and disconnect the sensor connector ( it is attached to the nipple clamp cooling system).

Check the heater circuit . Take the tester and “minus” to connect to the engine, “plus” fasten on contact “B”. Turn on the ignition and watch the tester readings : should show 12V. If the tester reading less than 12c or non-existent , then either discharged battery ( which is unlikely ), or an open circuit voltage ( troubleshoot ) . It can also be a problem with the computer , but as a rule, on-board computer immediately indicates this error .

How to check the oxygen sensor – lambda sensor

Check the sensor circuit . Measure the voltage between terminals “A” and “C”. minus at “C” on the plus “A”. The voltage should be 0.45 . If the voltage is missing or different in 0.02 and more – that faulty power supply circuit ( need to find and fix ) or faulty ECU (which is also unlikely ) .

Fully test sensor performance can only be an oscilloscope , which is not the majority of motorists , so I see no sense to describe the situation. Let me just say that you need to check is artificially cry poverty and enrich the fuel mixture and look at the sensor .

If the sensor is not enough  – more than 100.000km , it can be easily replaced. Because, even if he worker sensitivity deteriorated significantly – leading to unnecessary costs for gasoline.

Should accurately understand the operation of the sensor. Please note the following errors

Error R0131 Low signal of the oxygen sensor 1
Error R0132 HIGH level crankshaft sensor 1
Low level sensor means that the mixture is too rich .

High level sensor indicates that the mixture is too lean .

Note that these errors indicate the status of the fuel mixture , but do not fix the sensor fault . Therefore , when a data error , you first need to look at the fuel pressure and the presence in the intake air leaks , and only then pay attention to the sensor itself .


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