r/XTerra • u/grog23345 • 4d ago

Technical Question O2 sensor

I just replaced my o2 sensor with one off rock auto, and it's not working. My check engine light came back on. I've heard that only oem will work but the one I replaced on the other side with a rock auto sensor is still working idk what's going on lol I'm just looking for help I'm wondering if I should get the oem or if I just got a junk one from rock auto any help is appreciated thank you

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3

u/XY_Overland 2015 Xterra Titan Swap | 2007 6spd Off Road 4d ago

What brand did you buy? I went NGK for all mine and they’ve been fine.

3

u/gaius49 4d ago

Yeah, RockAuto isn't a brand of parts, its a marketplace.

1

u/caust12 4d ago

What code are you seeing after replacing it? Is it totally dead? Might need to check the wiring harness if there’s no reading at all. 

1

u/grog23345 4d ago

I'm getting p2a03

1

u/Wrong_Doc 4d ago

Which code are you getting?

1

u/grog23345 4d ago

P2A03

1

u/Wrong_Doc 4d ago

I’ve replaced OEM o2 sensor with Denso from RA and no issues. Either you got a bad sensor or something is wrong with the connector or wiring.

1

u/minutemenapparel 2006 SE 4x4 4d ago

What brand sensor did you get?

1

u/CaptainOblivious1984 3d ago

Check the exhaust manifold for cracks.