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You need a engine scanner and hook it up and it will tell you what sensor is bad.

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Q: How do know which O2 sensor to replace?
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Related questions

You are getting an obd II reading for a O2 sensor circut bank 1 slow responce Does anyone know if you need to replace the sensor or just clean it?

Replace it.


How do you replace oxygen sensor 1997 infinity q 45 t?

There are 4 of them on the car, so you need to know which one is faulty. To replace them is the same for all. Disconnect the connector to the faulty o2 sensor and using a o2 sensor socket or a wrench that will fit unscrew the sensor. Install the replacement sensor and reconnect the wire.


How to change an o2 censor?

To change an O2 sensor you need to disconnect the wiring harness from the sensor. Use an O2 sensor socket and ratchet set to remove the old sensor and replace with the new one.


How do you replace the O2 sensor on a 1996 Chrysler town and country?

An O2 sensor unscrews just like a spark plug.


How do you replace the Rear o2 sensor on 2000 gmc jimmy 4x4?

Remove the vacuum hose from the O2 sensor. Remove the wiring harness. Remove the O2 sensor retaining screws. Reverse the process to install the new O2 sensor.


What is a g2 sensor?

Do you know your alphabet ? o2 sensor ?


How do you replace or fix an CO2 sensor on a 1996 Honda accord ex?

You cannot repair an O2 sensor. Replace it.


How do you fix an O2 sensor on a 1996 Chevy V8 5L?

Ain't no fixing an O2 sensor. If there is a problem with it, replace it with a new one.


How do you replace the oxygen sensor in a 1995 Chrysler Concorde 3.3L?

With an o2 sensor socket.


How do you fix code p0138?

replace rear o2 sensor.


Is O2 sensor on 96 cavalier easy to replace?

Yes


How can you disable the check engine light for an o2 sensor?

replace the bad sensor and it will turn off.