How do I replace front oxygen sensors? (O2)
#1
Racer
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How do I replace front oxygen sensors? (O2)
Hey everyone - I searched but couldn't find a schematic or garage post about how to replace the two front oxygen sensors. I'm throwing code P2251, so just ordered the new sensors and would love to put them in this weekend - car is at 90k miles, so I figured I would just replace both of them. Any diagrams to share? Thanks!
#2
Race Director
Hey everyone - I searched but couldn't find a schematic or garage post about how to replace the two front oxygen sensors. I'm throwing code P2251, so just ordered the new sensors and would love to put them in this weekend - car is at 90k miles, so I figured I would just replace both of them. Any diagrams to share? Thanks!
Removing the tower strut bar will make it easier (3 nuts each end, 21 ft-lbs), 2 bolts on right side, 1 bolt on left side
Last edited by nfnsquared; 02-17-2011 at 04:58 PM.
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triax37 (03-12-2014)
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Thanks - when I wrote "front" I was trying to separate from secondary sensors after the cat. Quick follow-up - what's the best way to reach Bank 1 - from the driver side? I just bought the car 2 months ago, so am learning exactly where everything is located.
#4
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passenger side i think, haven't paid attention in a long time. You can see it between the rear of the engine and the firewall.
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triax37 (03-12-2014)
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There are actaully 4. 2 upstream (pre-converter) and 2 downstream.
http://www.acuraautomotiveparts.org/...s=&view=normal
http://www.acuraautomotiveparts.org/...s=&view=normal
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BiggieN (10-15-2020)
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#8
RAR
There are actaully 4. 2 upstream (pre-converter) and 2 downstream.
http://www.acuraautomotiveparts.org/...s=&view=normal
http://www.acuraautomotiveparts.org/...s=&view=normal
These should be them.
36531-RCA-A02 SENSOR, LAF
36531-RDM-A01 SENSOR, FR. LAF
36532-RKB-004 SENSOR, FR. SECONDARY OXYGEN
36542-RKB-004 SENSOR, RR. SECONDARY OXYGEN
Last edited by leedogg; 02-18-2011 at 11:10 AM.
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BiggieN (10-15-2020)
#10
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Keep in mind the computer is always checking the sensors, so if there was a big problem, you would get a Check Engine Light.
For those that want a writeup on changing the sensor, I put one together last week but put it in the "Problems & Fixes" subforum:
https://acurazine.com/forums/3g-tl-problems-fixes-114/e-130-diy-oxygen-o2-sensor-installation-rear-upstream-f-aka-p2251-811823/
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jimmriley (10-12-2012)
#12
Hey everyone - I searched but couldn't find a schematic or garage post about how to replace the two front oxygen sensors. I'm throwing code P2251, so just ordered the new sensors and would love to put them in this weekend - car is at 90k miles, so I figured I would just replace both of them. Any diagrams to share? Thanks!
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