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Old 03-13-2019, 05:52 PM   #1
Bunkabee
 
Drives: 2009 Yaris Sedan
Join Date: Mar 2019
Location: Reno, NV
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P0037 - Bank 1 Sensor 2

I've got a 2009 Yaris Sedan - 164k miles. I bought it (private party no warranty ) back in September of 18 and in October I got the P0037 code. I just now got around to messing with it and I can't seem to find the connection from inside the car. I've removed the center console and I can't find downstream O2 connection anywhere! I'm in desperate need of some guidance on where I can find this connection to get the O2 sensor changed and get rid of this dang code!
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Old 03-13-2019, 05:55 PM   #2
WeeYari
 
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You talking about the sensor located in the exhaust pipe?

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Old 03-13-2019, 08:27 PM   #3
yarisbug
 
Drives: 2019 Yaris SE Hatch
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Look under the car, follow the wiring from the sensor that is behind the catalytic converter.

https://www.obd-codes.com/p0037
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Old 03-14-2019, 09:17 AM   #4
2bz
 
Drives: 2008 Yaris 3DR Hatch MT
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Page EX-3.

https://cardiagn.com/1nz-fe-engine-exhaust-2007-yaris/


IMHO. Change both (upstream and downstream) sensors together. They work together better if the are both the same age. I know they cost more, but buy OEM/Denso parts. You will regret cheaping out.

https://www.rockauto.com/en/catalog/...2)+sensor,5132
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Old 03-15-2019, 04:25 PM   #5
Bunkabee
 
Drives: 2009 Yaris Sedan
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Thank you guys so much. I was about to say F*** it and never change them. I got the pre-cat sensor just fine, but trying to get the post-cat was making me crazy!
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Old 03-15-2019, 07:35 PM   #6
2bz
 
Drives: 2008 Yaris 3DR Hatch MT
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https://www.amazon.com/OEMTOOLS-2711.../dp/B00062ZK5M

This also makes things much easier.
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