Es300 Oz Sensors

[mcastle]

where are the "oz" sensors located on the es300?

[Steve]

hmmm I have an es300 but never heard of an oz sensor...

what does it do?

[Rob]

he means the O2 (oxygen) sensor.

[Monster-Mat]

OZ sensor........i think there only fitted in New Zealand

[mcastle]

Thanks, the 02 (oxygen) is correct. I only saw it written down by the dealer and mis-read it.

When sensor goes bad, the dash engine light comes on and the sensor needs to be replaced.

[OzAristoV300]

The oxygen (or Lambda?) sensor is usually located in the exhaust manifold. On a V6 it may have one in each manifold. The RX300 has one in each and were the subject of a factory recall last year. Typically it has one wire going to the sensor. It senses the quantity of unburnt fuel in the exhaust and adjusts the air/fuel mix accordingly. The typical symptom of a broken sensor is excessive fuel consumption.

[TRL Performance]

If you suspect the O2 sensor is fouled/dirty and not functioning you could always remove it, stick it in a solution of Lemon juice overnight to clean the deposits off.

If after refitting the fuel consumption is not better then get it checked out. Finally replace.

Sometimes they do get fouled up and a clean is all you need. Also check wires as well. All to many are replaced without need, just the connector is dirty, wires are broken or just plain dirty.

You've got nothing to loose have you?

BUT Never just stick a voltmeter between the contacts of the O2 sensor. You'll damage it. Only do so if you know the correct precedure for testing.

Regards

Pete