06 corolla s o2 sensor location

[AJ0319]

hey everyone. i am looking for the locations of the oxygen sensor on the car. my mechanic said it was the o2 sensor buy he wanted 5 hundred to replace it. i told him no. i also got a recall notice for my car for the ECM. can that cause the o2 sensor to fail and for the engine light come one. can someone let me know what i should do and where the location it of the o2 sensor.

[mikered30]

What was the code? There are 2 O2 sensors. You should get the ECU replaced. The 06s have a high ECU failure rate.

[AJ0319]

the code is PO138- haynes book -heated oxygen sensor circuit malfunction sensor 2.
auto zone is heated oxygen sensor(bank 1 sensor 2) circuit high voltage what ever that means.

do i change it or get the ECM change. the engine light goes off after a few days. its just funny after i get the recall notice this happens.

[mikered30]

That sensor is located under the car in the exhust pipe. It is not the sensor you see when you open the hood. Replace it with a NGK or denso direct fit sensor. You will have to pull back the carpet on the left side of the passengers side floor r to reach the connector. Then get the ECU replaced.

[AJ0319]

is the one when i open the hood near the fire wall in the middle. is it hard to change out.

thanxs man

[mikered30]

It is not the one you see when you open the hood. You have to get on the ground to see it. You will need an O2 wrench and some pb blaster to remove it. The Haynes book you have shows the location and the DIY on the removal of the down stream sensor.

http://matrixowners.com/index.php/to...r-in-a-matrix/

You can use a regular wrench.

[AJ0319]

thanks man for your help

[mikered30]

No problem. Make sure you get ngk (ntk) or denso direct fit and you should be ok. Stealer will have it, Oem should be denso, but the markup is huge.

Amazon has a denso for $50

BTW you should find a cheaper mechanic.

[Firepower]

Hi

Did you ever find out what caused the PO138 problem?

Thanks
Col