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Cars and trucks

Oxygen sensor test

gemini89
hace 6 años
hace 6 años
Hello I need to know if there is any method to test the oxygen sensor, outside the car, with tools such as multimeter, or if there are machines for that and can find in mechanics. The oxygen sensor is 4 wires. Thank you.
Mangel HH
Mangel HH
19.786
hace 6 años

Hi.
Of course, if there is a leak, a vacuum will be created causing a very important change in the map sensor signal which must be perfect.
Salu2.

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Carlinonda
Carlinonda
3.609
hace 6 años
hace 6 años
Often it is not a problem of the oxygen sensor, it can happen that there is a bad combustion and the sensor can not correct it, causes: a lot of spark plug light, air filter totally saturated with dirt, improper air intake, poor pressure regulation fuel sensor, temperature sensor malfunctioning just like MAF and MAP sensors, leaky nozzles, inlet or exhaust valves that do not seal Scanning would be a good measure to get a quick orientation.
Mangel HH
Mangel HH
19.786
hace 6 años

The oxygen sensor is a continuous and variable generator (although the oxygen content of the air can be considered constant) the range you are talking about is within normal parameters (0 and 1 Volt). Generally a fault in this system is caused by a voltage drop on the resistance of the sensor and / or conductivity of the exposed wiring / connector at the elevated temperature, the control module receiving a lower reading than the factory software establishes and demonstrating in the warning light is on. Salu2.

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gemini89
hace 6 años

Manuel, thank you, when you mention that it is within normal parameters you want to say that it is OK or the sensor is faulty? I also tell you that when it rises it reaches 0.7 V and almost 0.2 V this at about 3000 rpm. The other is that the Czech engine is not turned on by the o2 sensor.

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Mangel HH
Mangel HH
19.786
hace 6 años

The sensor is operating properly.
Salu2.

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gemini89
hace 6 años

Hello
I went back to comment this question since checking my car, when removing the cover that protects the exhaust manifold I found a partidura, and when accelerating it feels like air leaves, maybe it is not so much but it feels, I imagine that exit can also generate variations in the measurements made by the oxygen sensor, or should the leak be large enough to affect? Thank you.

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Mangel HH
Mangel HH
19.786
hace 6 años
hace 6 años
Hola. Adjunto.   Salu2.
gemini89
hace 6 años

hi thanks for the video, I tell you, I was measuring a couple of hours the operation and finally reached the measurement of the voltage of the signal, which I measured for several minutes and fluctuated between 0.3 and 0.6 V. so that the signal should be between 0.1 and 0.9 V. What conclusion can you get? the sensor works well considering that these values ​​could regulate the computer or indisputably the sensor is not working well ?. I wait your answer. thank you very much.

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