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Old 09-25-2014, 01:46 PM   #1
Levi3434
Scooby Newbie
 
Member#: 327489
Join Date: Jul 2012
Default 2008 Impreza 2.5i, CEL P0134

Having a P0134 (Front o2 sensor) and occasionally a P0031 (misfired?) Which from what I've read are related and both point to a bad front o2 sensor.

I'd like to do the work myself, since it seems pretty simple.

Not 100% sure which sensor is the o2 sensor. I have one before the cat, that has a grey cable/plug and one that goes into the cat(i think) that's orange. I can post pictures later if needed. I think the grey one is the one I need to replace. Anyway, I found 2 Denso (I think these are OEM?) sensors, not sure which one I need.

If I take the old one out will it have the part number written on it somewhere?

Here's a link of the 2 sensors.

Denso 234-4445
Amazon.com: Denso 234-4445 Oxygen Sensor: AutomotiveAmazon.com: Denso 234-4445 Oxygen Sensor: Automotive

Denso 234-9123
Amazon.com: Denso 234-9123 Oxygen Sensor (Air and Fuel Ratio Sensor): AutomotiveAmazon.com: Denso 234-9123 Oxygen Sensor (Air and Fuel Ratio Sensor): Automotive

Any help would be great, thanks.
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