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

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" data-medium-file="https://i0.wp.com/www.6294.org/wp-content/uploads/2015/08/P0141-Screenshot.jpg?fit=208%2C300&ssl=1" data-large-file="https://i0.wp.com/www.6294.org/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.6294.org/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.6294.org/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.6294.org/wp-content/uploads/2015/08/P0141-Screenshot.jpg?resize=208%2C300&ssl=1 208w, https://i0.wp.com/www.6294.org/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 mine OBD II device


for the short emissions automobile (LEV) model, if you have the Ultra short emissions vehicle model (ULEV) girlfriend would need a different O2 sensor. The great news is that adhering to my replacement of the O2 sensor, the P0420 cleared together well. I have now propelled over 5000miles since this DIY repair with no codes.

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Materials: 1. Brand-new O2 sensor, 22mm O2 sensor socket (not really crucial 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.6294.org/wp-content/uploads/2015/08/zoom-o2-socket.jpg?fit=300%2C194&ssl=1" data-large-file="https://i1.wp.com/www.6294.org/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.6294.org/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.6294.org/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.6294.org/wp-content/uploads/2015/08/zoom-o2-socket.jpg?w=400&ssl=1 400w, https://i1.wp.com/www.6294.org/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. Move the prior passengers seat as forward together possible, climate from the behind of the seat, peel ago the floor carpet under it. This is to expose the connector of the O2 sensor. I was able to carry out this there is no removing the front seat.


Carpet partly peeled mirroring grey O2 connector


" data-medium-file="https://i0.wp.com/www.6294.org/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.6294.org/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.6294.org/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.6294.org/wp-content/uploads/2015/08/O2-connector-grommet-back-seat-e1442034169967.jpg" alt="Carpet completely peeled mirroring the rubber grommet (black) attached come the floor" width="580" height="326" srcset="" data-srcset="https://i0.wp.com/www.6294.org/wp-content/uploads/2015/08/O2-connector-grommet-back-seat-e1442034169967.jpg?w=580&ssl=1 580w, https://i0.wp.com/www.6294.org/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 fully peeled showing the rubber grommet (black) attached to the floor in addition to the O2 sensor connector


2. Detach the O2 sensor connector and then eliminate the rubber grommet. On slide this v the opened in the floor i beg your pardon the grommet covers.



3. Jack increase the left next of the vehicle and also suspend on assistance stands. Making use of 2 assistance stands; front and also rear, will provide you an ext room to occupational under the vehicle. Remember, never ever work under a auto supported through a auto jack alone. Jacks can fail!


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


The O2 sensor attached to the catalytic converter with heat shield in place.


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


Heat shield off


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


" data-medium-file="https://i2.wp.com/www.6294.org/wp-content/uploads/2015/08/Cat-without-o2-sensor-e1442034055722.jpg?fit=300%2C169&ssl=1" data-large-file="https://i2.wp.com/www.6294.org/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.6294.org/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.6294.org/wp-content/uploads/2015/08/Cat-without-o2-sensor-300x169.jpg" alt="O2 sensor out 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 also attach them to the new sensor wire. Once doing this, place them at the exact same positions they populated on the old sensor. Match the length from the connector come the rubber grommet on the old sensor to the on the new sensor, then usage adhesive tape to ensure that the O2 sensor cable does no move back and forth on the new sensor.


Old and brand-new O2 sensor next by side. Observe the plastic clips on the old sensor


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

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This will ensure your brand-new sensor doesn’t gain locked increase by rust. This Denso indigenous this seller ~ above Amazon

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Anti-seize used to object of O2 sensor


8. Replace O2 sensor.


New O2 sensor installed on cat


9. Follow turning back steps. Clear your codes using an OBD device. If you have a P0141 and also P0420, attend to the P0141 an initial it may take care of the P0420. Over 5000miles and counting since replacing this and no codes!


" data-medium-file="https://i1.wp.com/www.6294.org/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg?fit=300%2C169&ssl=1" data-large-file="https://i1.wp.com/www.6294.org/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.6294.org/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.6294.org/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg" alt="All done" width="580" height="326" srcset="" data-srcset="https://i1.wp.com/www.6294.org/wp-content/uploads/2015/08/Finished-1-e1442034032910.jpg?w=580&ssl=1 580w, https://i1.wp.com/www.6294.org/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!