(P0051) How to Change a Failing/Failed Oxygen Sensor (O2) --- 1999-2004 Jeep Grand Cherokee WJ

Do you have a 'P0051' Diagnostic Trouble Code (DTC)? Or another DTC involving the Oxygen Sensors (O2)?
In this Video, I provide a detailed How-To Guide to change your Failing/Failed Oxygen Sensor (O2) in your 1999-2004 Jeep Grand Cherokee WJ. This Video covers the 4.7L V8 Engine ONLY.
Part Numbers to Note:
-Bank 1 Sensor 1 (Driver's Side Upstream) = Mopar Part# 56044580AA
-Bank 1 Sensor 2 (Driver's Side Downstream) = Mopar Part# 56044582AA
-Bank 2 Sensor 1 (Passenger's Side Upstream) = Mopar Part# 56044581AA
-Bank 2 Sensor 2 (Passenger's Side Downstream) = Mopar Part# 56044583AA
Leave a THUMBS-UP if this Video/Information was helpful! Thank you!
Music used in this Video:
"257" (Simple Metal) by TeknoAXE's Royalty Free Music
Licensed under Creative Commons 4.0
teknoaxe.com/Li...
#howto #helpful #jeeplife
Disclaimer:
The information, demonstration and any content contained in this video is for informational purposes only. The user, American Made Classics, makes no warranty, express or implied, regarding the effectiveness or safety of the contents of this video. In no way should the contents of the video, including the tools used, be repeated or tried by anyone. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. American Made Classics shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by American Made Classics and therefore, American Made Classics does not warrant that the video is unaltered or not modified. Any links in this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Therefore, viewer agrees to release, waive, and discharge American Made Classics or anyone affiliated with American Made Classics, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law.

[@GenXcollector]

Thank you for demonstrating the button on the connector. All the other videos were like, "you just disconnect the plug ..." But I couldn't get mine apart.

[@danielbrown319]

I was actually looking for a video on how to get the sensor out since they are usually fused to the pipe. I havent tried to remove mine yet but this gives me hope! Like the other guy said i usually turn the ignition on 3 times in a row without starting to get the codes, and also you can clear a check engine light on wj by taking your positive battery terminal off and bridging it with the negative. Resets the whole computer. Thanks for the vid!

[@songsfromthelord888]

Thanks, American Made! Very helpful, very informative video 🙂 I have an '03 Grand Cherokee 4.7 with over 90 thou I think I'm going to go ahead and replace all four. Thanks again and Remember, God loves you 🙂

[@versionvisual]

good video, but that denso brand part number does not apply to the wj 1999 model with California emissions, I share the part number for the wj 99 with California emissions upstream DENSO 2344635 and downstream DENSO 2344602, the wj 99 model it is a round connector, the 2004 model is a square connector, greetings 🙋‍♂️

[@MattieMattieMattiful]

Great video, thanks so much for making and posting. After I replaced this sensor, my check engine light went off on its own after driving X amount of miles (X being I did a couple errands driving locally/a couple freeways). For kicks and giggles I thought I would scan for codes and much to my surprise I still saw P0051 (and also P0152, a related code). Maybe it is a matter of time for everything to sync up and/or the Jeep's computer to process a clear reading? But it's interesting that my CEL actually went off but I am still scanning for the original codes that tripped the CEL in the first place.

[@itzchaseyboi]

Well at least on the plus side yours seems like it's running well. My WJ is a nightmare to even keep cranked while it's cold. It sputters, shakes violently, idles really low and shuts off until it gets up to full operating temp. Turns out all 4 of my o2 sensors are shot so that would explain it. Thanks for the video though, I'm gonna give it a shot and try to replace all of mine myself.

[@PureNathan96]

Did that solve the issue? My jeep does the same thing

[@floob247]

THANK you. Just made that easy.

[@420bodean]

Hey bud,, Good Detailed information on your video. Thanks again for sharing.

[@waszkowiec]

Denso is not a cheap chinese brand.

[@user-vu3xb7qn8g]

I believe Denso is what MOPAR used.

[@bimsautotech9656]

Sorry sir.. i want to know where is engine number identification on 4.7L V8 grandcherokee ? Can you take o photo for that please ? 🙏

[@user-vu3xb7qn8g]

Great video but for the life of me I could not get that connector unhooked. I couldnt even get it out of the holder to drop it down far enough to get a grip on it. I cut the krap out of my hands and arm and I finally gave up.

[@AmericanMadeClassics]

Ouch. Yeah that is the downside to working on things underneath of the car...Things are exposed to a lot of elements and can be very hard to get apart sometimes. Which is why I was surprised when mine came apart so easily.

[@jat-justamaturetech-philpj8285]

Hi, on my 2000 wj 4.0 im getting a Po172-Po175 oxy sensors 1&2 after i replaced all my 1 hole injectors with 4 hole injectors. Now running rich. I thought maybe the ECM was retraining for the new injectors but now im thinking it's the fuel pressure regulator which is in the fuel filter that i replaced 2 year's ago. What do you think?

[@gregorysamaniego36]

Oriley man wanted a tip lol

[@SkylerSchuchmann]

Question - did you have to replace that sensor shortly after or did it end up working OK?

[@AmericanMadeClassics]

Worked just fine!

[@SkylerSchuchmann]

Awesome - thanks for the update. Appreciate the video!

[@jimmyatnip2510]

For these vehicles you don't need a code scanner. Simply turn the ignition on, the off, then on, then off, then on and leave it on and it will give you the codes. Let the odometer come on each time that you turn the key on before you turn it off.

[@jdmteggy2388]

how do u kno if u have california emissions one or not?

[@morrismercier9849]

I have an 03 grand Cherokee with same exact 02 sensor bad. I have replaced it twice. I still get same P0051 code. Very frustrated. Please help.

[@AmericanMadeClassics]

Did you have someone clear the code after replacing the sensor

[@bitterellaselectricgroove8544]

My check engine light was on, code for O2 sensor. Is the sensor you changed the one that typically triggers the CEL? If not, how will I know which sensor? Thank you in advance and great video, super helpful!! 👍

[@AmericanMadeClassics]

The code will tell you which sensor is in question. In the video, I explain what each sensor is called. Such as "Bank 1 Sensor 1," would be calling for the Driver's side Upstream O2 (which means before the Catalytic Converter). You'll have to go back and rewatch, that information is in there! Good Luck!

[@bitterellaselectricgroove8544]

@@AmericanMadeClassics I did and I understand now. Thanks so very much!!!

[@jat-justamaturetech-philpj8285]

Where are the bank's for a inline 6?

[@oryxr5354]

The inline six only has one bank, all the cylinders are in a row so there is not a second bank

[@jat-justamaturetech-philpj8285]

@@oryxr5354 I have 4 sensors, two on the left and two on the right.

[@Mowtivated1]

Nothing wrong with Denso man

[@JahsonnM313]

Thanks so much for the advice and video. I totally fixed my Jeep today no engine light all codes are gone.🫡