I took on this repair since my 2003 Honda Accord 2.4L (LEV) had arisen a P0141 (O2 Sensor Heater Circuit break down (Bank1, Sensor2)) code. Its also worthy to note that while ns waited because that my instead of aftermarket Denso 234-4797 Oxygen Sensor

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" data-medium-file="https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/P0141-Screenshot.jpg?fit=208%2C300&ssl=1" data-large-file="https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/P0141-Screenshot.jpg?fit=360%2C520&ssl=1" loading="lazy" class="lazy lazy-hidden wp-image-268 size-medium" src="https://i1.wp.com/www.rememberingsomer.com/wp-content/plugins/a3-lazy-load/assets/images/lazy_placeholder.gif?resize=208%2C300" data-lazy-type="image" data-src="https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/P0141-Screenshot-208x300.jpg" alt="P0141 on my OBD II device" width="208" height="300" srcset="" data-srcset="https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/P0141-Screenshot.jpg?resize=208%2C300&ssl=1 208w, https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/P0141-Screenshot.jpg?w=360&ssl=1 360w" sizes="(max-width: 208px) 100vw, 208px" data-recalc-dims="1" />P0141 password on my OBD II device


for the low emissions automobile (LEV) model, if you have actually the Ultra low emissions auto model (ULEV) girlfriend would require a different O2 sensor. The an excellent news is that adhering to my instead of of the O2 sensor, the P0420 cleared together well. I have actually now thrust over 5000miles due to the fact that this DIY repair with no codes.

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Materials: 1. New O2 sensor, 22mm O2 sensor socket (not really important if your sensor is not rusted in, mine wasn’t. A thick 22mm spanner must be adequate), 10mm wrench and support stands.


" data-medium-file="https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/zoom-o2-socket.jpg?fit=300%2C194&ssl=1" data-large-file="https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/zoom-o2-socket.jpg?fit=400%2C259&ssl=1" loading="lazy" class="lazy lazy-hidden wp-image-274 size-full" src="https://i1.wp.com/www.rememberingsomer.com/wp-content/plugins/a3-lazy-load/assets/images/lazy_placeholder.gif?resize=400%2C259" data-lazy-type="image" data-src="https://i3.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/zoom-o2-socket.jpg" alt="My 22mm O2 socket" width="400" height="259" srcset="" data-srcset="https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/zoom-o2-socket.jpg?w=400&ssl=1 400w, https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/zoom-o2-socket.jpg?resize=300%2C194&ssl=1 300w" sizes="(max-width: 400px) 100vw, 400px" data-recalc-dims="1" />My 22mm O2 sensor socket


1. Relocate the prior passengers seat as forward as possible, then from the behind of the seat, peel earlier the floor carpet under it. This is to disclose the connector of the O2 sensor. I was maybe to execute this without removing the former seat.


Carpet partially peeled reflecting grey O2 connector


" data-medium-file="https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/O2-connector-grommet-back-seat-e1442034169967.jpg?fit=300%2C169&ssl=1" data-large-file="https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/O2-connector-grommet-back-seat-e1442034169967.jpg?fit=580%2C326&ssl=1" loading="lazy" class="lazy lazy-hidden wp-image-263 size-full" src="https://i1.wp.com/www.rememberingsomer.com/wp-content/plugins/a3-lazy-load/assets/images/lazy_placeholder.gif?resize=580%2C326" data-lazy-type="image" data-src="https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/O2-connector-grommet-back-seat-e1442034169967.jpg" alt="Carpet fully peeled mirroring the rubber grommet (black) attached come the floor" width="580" height="326" srcset="" data-srcset="https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/O2-connector-grommet-back-seat-e1442034169967.jpg?w=580&ssl=1 580w, https://i0.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/O2-connector-grommet-back-seat-e1442034169967.jpg?resize=300%2C169&ssl=1 300w" sizes="(max-width: 580px) 100vw, 580px" data-recalc-dims="1" />Carpet completely peeled mirroring the rubber grommet (black) attached come the floor in addition to the O2 sensor connector


2. Detach the O2 sensor connector and then remove the rubber grommet. Slide this through the opened in the floor which the grommet covers.



3. Jack up the left next of the vehicle and suspend on assistance stands. Utilizing 2 assistance stands; front and rear, will give you more room to work under the vehicle. Remember, never ever work under a automobile supported by a automobile jack alone. Jacks have the right to fail!


I guess girlfriend no what this is, no need for a title.


The O2 sensor attached come the catalytic converter with warmth shield in place.


4. Time to acquire dirty, walk under the vehicle, remove the plastic clips hold the O2 sensor wires to the underside of the vehicle. Eliminate the 4 10mm bolts hold the bottom fifty percent of the warmth shield in place.


Heat shield off


5. Unscrew the O2 sensor using the O2 socket or 22 spanner, Some sources recommend running the engine because that 1 min and then shutting it turn off to lull the loosening of the sensor. I didn’t perform this and also the sensor came loose with minimal effort.


" data-medium-file="https://i2.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Cat-without-o2-sensor-e1442034055722.jpg?fit=300%2C169&ssl=1" data-large-file="https://i2.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Cat-without-o2-sensor-e1442034055722.jpg?fit=580%2C326&ssl=1" loading="lazy" class="lazy lazy-hidden wp-image-270" src="https://i1.wp.com/www.rememberingsomer.com/wp-content/plugins/a3-lazy-load/assets/images/lazy_placeholder.gif?resize=433%2C244" data-lazy-type="image" data-src="https://i3.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Cat-without-o2-sensor-300x169.jpg" alt="O2 sensor the end of catalytic converter" width="433" height="244" data-recalc-dims="1" />O2 sensor out of catalytic converter


6. Harvest the plastic connectors from the old sensor wire and attach them to the new sensor wire. When doing this, ar them in ~ the exact same positions they lived in on the old sensor. Match the size from the connector come the rubber grommet ~ above the old sensor to the on the new sensor, then usage adhesive tape come ensure the the O2 sensor wire does no move back and forth on the brand-new sensor.


Old and new O2 sensor side by side. Observe the plastic clips ~ above the old sensor


7. Apply anti-seize past to the O2 sensor threads.

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This will certainly ensure your new sensor doesn’t acquire locked increase by rust. This Denso native this seller on Amazon

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Anti-seize applied to subject of O2 sensor


8. Replace O2 sensor.


New O2 sensor mounted on cat


9. Follow reverse steps. Clear her codes making use of an OBD device. If you have a P0141 and also P0420, resolve the P0141 an initial it might take treatment of the P0420. Over 5000miles and counting since replacing this and also no codes!


" data-medium-file="https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg?fit=300%2C169&ssl=1" data-large-file="https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg?fit=580%2C326&ssl=1" loading="lazy" class="lazy lazy-hidden wp-image-271 size-full" src="https://i1.wp.com/www.rememberingsomer.com/wp-content/plugins/a3-lazy-load/assets/images/lazy_placeholder.gif?resize=580%2C326" data-lazy-type="image" data-src="https://i3.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg" alt="All done" width="580" height="326" srcset="" data-srcset="https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg?w=580&ssl=1 580w, https://i1.wp.com/www.rememberingsomer.com/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg?resize=300%2C169&ssl=1 300w" sizes="(max-width: 580px) 100vw, 580px" data-recalc-dims="1" />All done!