Good O2 Sensor Data (Real Time)

Good O2 Sensor Data (Real Time).Precat sensor.

Category:

Autos & Vehicles

Tags:

• Good
• O2
• Sensor
• Data
• (Real
• Time)
• richpin

[djvj2ert]

ive got 2 sensors on my zafira,a pre cat one & one after the cat.the pre cat ones reading is all over the place & also switching from lean to rich quickly,the other is reading 450mv & moving slightly up & down & on lean all the time,ive got high co on the emissions for the mot,which sensor is faulty here?anyone got any ideas?i don't know which one to replace.

[richpin06a]

@djvj2ert Both sensors sound like they are working properly to me.

[djvj2ert]

@richpin06a lol bugger,i'll never get to the bottom of this problem

[richpin06a]

@djvj2ert Have you looked at the simple things first like spark plugs, air filter ,pcv .Is the coolant temp getting hot enough and is the computer seeing the right temp from the coolant temp sensor.

[richpin06a]

@djvj2ert If you have one of those pull you own part junk yards around you could pick one up for nothing and try that.

[mgza2007]

hey, whats the name of that scanner you are using? all i could find are obd2 scanners, but they look like they just read codes.

[richpin06a]

i am using a Auto Xray EZLINK

[utunerd47]

The government has you clowns running around worrying about OXY SENSORS instead of HORSEPOWER. In the old days we'd laugh you dopes out of the SHOP.

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[djvj2ert]

@nesgael1 it doesnt matter now anyway.i sold that car 3 months ago when the pas packed up on it.the high emmisions turned out to be a knackered cat.loads of dosh

[nesgael1]

@djvj2ert  to continue: carbon monoxide Hydrocarbons and NOX indicates the possibility of incomplete combustion and / or Catalytic converter inefficiency. Incomplete combustion can be a product of many factors. Timing belt, spark plugs, Knock sensor, Low compression, Fuel regulator , Incorrect injector pulse width, Mass airflow meter problems, valve problems, i can go on. some of these problems may not yet trigger the check engine light so please take a broad view of the problem. good luck!

[nesgael1]

@djvj2ert You actually answered your own question! The oxygen sensor is measuring oxygen content and catalytic efficiency based on oxygen content. Hydrocarbons and carbon monoxide is treated by one part of the converter generally leaner than 450 mv and NOX by a different part usually richer than 450 mv. It is possible to get favourable oxygen sensor readings but have CO readings that are above the limit.. The oxidation of carbon monoxide to carbon dioxide is not measured by the sensor

[djvj2ert]

@richpin06a yeah,noing my luck i would get another knackered one,ive ordered 2 universal ones off ebay anyway.that should sort it one way or another.

[djvj2ert]

@richpin06a yeah i have checked all that.the co is on 0.452% its supposed to be 0.200% the garage said the cat was ok & they sjjested a lambda sensor but seeing thry are £50 each i only wante to replace 1