Replacing Crank Position Sensor on JEEP GRAND CHEROKEE WJ 4.0 | How To

Hey guys today my Jeep just stopped running as i was driving it. So I replaced the Crank Shaft Position Sensor and it started running great again! Just like America. I show you the easiest way to change it. Use Two People!!! Took about an hour but I'm sure I can change one out in like 20 to 30 minutes.
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[@NajarOffroad]

Thanks for watching! If you want to support the channel for future videos get your merch at 🤟 Najaroffroad.com 🤟

[@noechavez2132]

Hi

[@hugogarcia7495]

Bro your video is a life saver I did exactly how u said. definitely is the easiest way thank you! no more walking.

[@wrucebayne2488]

Old faithful wasn't starting, ended up pulling up a code for a bad Crankshaft Sensor yesterday, so thanks for the video. Will definitely be fixing her this way!

[@richarddumag9771]

I replaced the CPS on my 2004 Jeep Grand Cherokee Laredo today. I watched this video and few others before doing the work. I used a 18 inch long extension and universal joint with the 1/4 rachet and 11 inch socket. I did the work from under the Jeep and under the hood. It took me about 30 mins to remove the old sensor and install the new one. Even though have small hands and skinny arms it was still a lot of work trying to get the right position with the hands and arms.

[@bravokilo1972]

I have changed many of these by myself from the bottom of my jeep using a long extension and swivel... Then plugged it up from the top. Not simple but very doable by yourself!

[@fernandolouismiramontes2520]

This is how I do it too. All from underneath, long extensions on ratchet to take bolt out and then reaching over the transmission with my hand to remove and install new crank sensor. Push wire up and over onto passenger side of engine and reconnect the plug.

[@jedidias7091]

I'm going to attempt it from the bottom first. Is it hard lining the sensor up is my concern and adding the bolt back from being so far away.

[@robertsheeley8619]

I’ve done it both ways several times each. I find it much easier from the inside than from below. I use a wobble 1/4” extension and do this by myself with no issues at all. From underneath it takes around 30” of extensions versus one 10” wobble from the top. Plus the bolt goes in real easy from the top. But to each his own.

[@bravokilo1972]

@@robertsheeley8619 I’ve always wanted to try it going in from the plug hole on the fire wall. But it takes a few extra steps to get at it but probably well worth it. Because mine is now stripped I’ve changed them out so much on my 99’ WJ 4x4..😖 But you are saying from the “top.” So are you referring to the plughole area under the dash? Or from the top of the engine compartment/bell housing area? Because if you are talking from the top of the engine compartment, that would pretty much be mission impossible too get a tool down into that small of an area…

[@robertsheeley8619]

@@bravokilo1972 Yes I'm referring thru the plug hole. I have a shop manual and that's the way Chrysler says to do it. But like I said, I've done them both ways.

[@diffsnicker4664]

thanks man ur vids are always the best just fixed the spark plugs and the fuel pump was hoping my WJ would decide to not break down for a week or two

[@lisaperea5151]

You rock! Thank you for the video. Great instructions and great directions.

[@johnstoyak]

Thanks for your video! It helped but I did it by myself it's easier with someone helping but I own a body shop and so my own mechanic work and most of the time I work alone. It's in a bad place but I was able to not only get it in but I put that bracket back on because the way it's shaped it adds strength to the plastic sensor. It's there for a reason. But again thanks for your video!

[@mrblondeheart9562]

Hey man, I got my Jeep WJ about 2 weeks ago and I love it. Your videos helped me decide what car I wanted and it happened to be this Jeep. I just fixed a misfire (P0303 aka: cracked fuel injector) it had. She runs great now and I can’t wait to lift her and get some beefier tires on her. Your videos are a great inspiration. Keep up the good work, bro!

[@NajarOffroad]

Thanks man! Congrats on the purchase! Did you upgrade the injectors or just bought stock ones?

[@ryansrepairs]

Thanks man, this saved a ton of time. FYI if you jack the engine up a little it lines that bolt up way better.

[@brandonnewman98]

Im having to do this right now on my 03 WJ w/4.0L drove 700 miles and she just randomly cut off. So glad i could find your video & i will recommend watching your video on Facebook's "Jeep WJ'S Only" page

[@NajarOffroad]

Thanks brotha! I’m part of that group haha

[@faronsquare4911]

Dude!! I love your videos!! Always look for you when I have problems with my jeep 😂👍💯

[@BLAZEPSI]

Thanks for sharing. Will be doing mine. Only thing I will change is either use OEM(MOPAR), or NGK. Its kinda difficult to do, so its wiser to buy reliable part.

[@deand8576]

I have a 4.0. I just used a 8" flexible socket extender and it went right in. That was after about an hour of trying to pierce together extensions. A trip to HD and it was done.

[@charlesheinrich6817]

02 WJ was shutting off while driving and well, all signs led to the crank sensor. I was dreading it 'til I watched this. While not easy not super hard either, thanks to your tips. Did it solo, so took some time to get the bolt that hold the senor in to go. It's in now and running fine.Thank you !

[@NajarOffroad]

Nice! Glad you got it figured out!

[@garsgonewild]

what brand sensor did you use

[@karlsven]

lmao literally just yesterday I replaced the crankshaft sensor on my jeep wj 4.7. had to solder in a new 3 pin connector too because all 3 of the wires were exposed and 1 was about to snap apart. but love the videos man keep them up!

[@NajarOffroad]

That sounds horrible😂 is it harder to get to on a 4.7?

[@scottpatterson3491]

hey guys. this is a great video. it can be the crank sensor or the coil. in my old jeep it was the coil causing similar problems. My 2004 Jeep it was the crank sensor. One sucking position but this Video helped a lot

[@aussietaipan8700]

I replaced mine on my 2000 WJ 4.7 back in August, engine was basically running too rough to drive it and I had a mil code PO320, new one installed and perfect until today when the engine shut off in the middle of a busy intersection. Lucky the Jeep had enough momentum to get onto the other road where I pulled over. Mil light on again. Towed home and code PO320 again.

[@vic_d_10]

I just replace mine on my 01, by myself. Took me just over an hour. Getting the old one out was fairly easy. Putting the new in was a bit of a challenge. Good thing I had bought a big ole jar of patience this morning.

[@jean-pierrehall2914]

Hey Vic. About to replace mine on 02 JGC. I notice you did it solo. Any tips? Thx. Peace

[@vic_d_10]

@@jean-pierrehall2914 Patience! Aligning the new one with the hole was my main issue. I had to reach over the engine as shown on the video and blindly install the sensor. Patience.

[@brandonmeikle7551]

Im soo glad i watched ur video cuz my jeep does the same thing and i was on the right track, just gotta get in there and do it. My check engine light never comes on after it shutting off and it does work so we will see

[@markcarpenter3600]

Check engine codes unfortunately the code for the crank position sensor is the same as the cam position sensor. Change the cam position sensor first, it has moving parts and it is easy. Then go to the crank position sensor. 20" extension with a short wobble (not a swivel) extension can get to this bolt from below. I can't remember the size, but it is an SAE bolt not metric. The ratchet end of the extension will be near the transfer case. The cardboard sticker on the tip of the sensor sets the depth of the sensor. If I remember correctly you will need to remove the front driveline. It takes about an hour to replace the sensor. This is serviceable from underneath the vehicle. This is one part you want OEM from the dealer.

[@timhogan745]

This was very helpful, thanks

[@artt111188]

My wife's cars position sensor shifted... because of your video now I can limp it to a shop!

[@markgabello58]

You're going to help me I'm the old one Jeep Grand Cherokee with a 6 cylinder luckily it's still running but I see that area code stupid place but I think your help me with this

[@aaronrose8477]

I have been trying to diagnose the same problem for so long thank you for your help

[@isaactaylor5936]

Thank you

[@markgabello58]

Hi guys, I have a 2001 Jeep Wrangler. Do I like the way you're doing it? It's better than going underneath it. Remove the carpet a little bit near there. Good job, may I replace the cam sensor and at 302 code still coming up so it looks like I have to replace that other censor.❤

[@car5car5]

Thanks! Keep going with videos!!!

[@danpost18]

Thanks for the video bro my Jeep is doing the same thing it turns off and then I can crank it back on again. I replaced the fuel pump and filter and it keeps doing the same thing. I will replace the crank sensor. How long did it take you to replace the sensor bro. Again many thanks for the video.

[@JoseSilva-ee5kk]

Is their a diffrent variation of the sensor? I bought one to change on my 2002 jeep and when i put the new one in it started turning on rough and make weird noises.

[@gilbertmata7951]

I'm having the same issues with my 02 jeep same it's a 4.0 motor.i have a p 1320 code indicating that it's either the crank or camshaft sensor or could be both how you mentioned did you relearn the computer after you installed the crankshaft sensor?

[@brianbrantley2969]

I appreciate this video it helped me change mine a lot of your other content is dope as well. I also own a 99 Grand Cherokee myself and I’m bustling on it. Have you talked to anyone that’s had problems with a parasitic draw?

[@NajarOffroad]

I’m glad it was able to help you out? No I don’t! My friend had one on his Dakota and it was an amp I believe

[@user-fd8kk2lv9j]

How do i get the crankshaft position sensor out i got the bolt off but the senor doesn't want to come up.and out help please

[@angelmedina541]

Hey friend, what symptoms did your Cherokee have when that sensor failed?

[@jill5454]

my 2004 wouldn't start so my shop diagnosed the crank sensor. (charged me $200 for labor! - but i guess maybe it was worth it, watching the difficulty of getting to it. ) As I drove off from the shop, I heard a new sound coming from below the shift area, mostly when decelerating, kind of like a computer disc, that with research we attribute to a cable rubbing on the drive shaft. The sound speeds up and slows down with the speed of the car. Does it make sense that this could have happened during the changing of the crank sensor? My shop is going to lift it up and take a look, but today (5 days later) it seems to be subsiding. Could the cable that was moved have worked it's way back to a more normal position?

[@ChronixBlazes420]

What year is it just got a 99 wj and replacing sensor tomorrow

[@Maxx_bulls]

My Jeep only starts if I spray starting fluid in ignition but once it starts it will stay running.. any idea what I can do to fix it?

[@MsJOEL29]

Hi all. I replaced mine but my Jeep won't start. I did clean the throttle body before installing the air vents. I don't know if I spray too much throttle body cleaner or if the sensor is not working for me. Any ideas?

[@josephlfrazier9727]

The trouble code error check with digital odometer most likely would have showed P0302. To check odometer trouble code readout.....Turn ignition on till odometer miles shows mileage, then turn off right away....do that three times, each time make sure mileage shows, then turn back to off. Do three times, if there is a code to show, it should show after third time. If there's no trouble code, no code will show. Worked on my 1999 Grand Cherokee Laredo 4.0. I had, have bad crankshaft sensor showing P0302.

[@bojaber2235]

Hello my friend, after changing the sensor, I got an error p0353.. Please help me..🌸

[@marcosacevedo3656]

Is it the same for 5.2 Jeep?

[@miguelantimo9851]

I live in LA how much would you charge me to change mine out I’ll go out to you

[@southbay281]

Did it throw a code ?

[@noechavez2132]

I have a 2003 cherokee and it marks me the code p0340, could you help me. It starts and walks well but suddenly acts as if the gasoline failed and it turns off but it turns on without problems. It marks the low oil level and then goes up. But on the road it pulls very well

[@NajarOffroad]

Replace the camshaft and crankshaft sensors! Also clean your battery terminals cause mine to have a similar issue!

[@dennisjones7251]

Replaced cranksensor jeep will not run what can I do

[@BoostedMotorsports]

How much HP does a new sensor add?

[@NajarOffroad]

It’s faster than your viper now😜

[@davidnowlin8570]

I'm doing same repair i need the 1 bolt sensor you're showing what year is your jeep please help me

[@NajarOffroad]

Mine is a 2002

[@brikovach9812]

My Denver came with a sticky on the bottom do you leave it on or take it off

[@NajarOffroad]

Leave it on

[@dogsarefun2]

Mine would crank buy no start, had mine towed to jeep dealer 10 years ago, had the mopar part and they charged $245 for installing it..... can't imagine what they would charge now....

[@georgequintanilla8811]

Can you explain to me ...why my Jeep Cherokee Laredo (2004... November) Rpm go so high when d mileage only goes 40 mph...when ever I unplug d negative pole it it restart normal...sometime it goes of again and I got to unplug d negative pole again

[@NajarOffroad]

I cannot😂 maybe the ecu might be going?

[@wyattejoseph6464]

Sounds like a vacuum leek

[@heppeledwardc2540]

I have a 4.0 wj 2003 when i release the gas it whines whyy? I checked so many things any idea?

[@Jacobwafflez]

Could be alternator wine

[@rayaadair4927]

Hi my 2004 Jeep keeps turning off while driving I took it to mechanic spent 500 dollars to supposedly fix it but problem still there please help me figure out what to do I’m tired of getting screwed over cause I don’t know better

[@NajarOffroad]

What did they change out? Could be this sensor or worst case scenario pcm

[@dominiccattano9325]

Whassup man.. the issue with your jeep got fixed ... did the cranck sensor was the one that keep turning off your Wj ???

[@NajarOffroad]

No more issues with it starting 💪

[@jamesmercer9977]

Ok. I did the replacement of the crank censor and it started once, now won’t start. Fuses are good etc... help

[@sinwoovts41]

Cam sensor maybe aswell?

[@oluoch28304]

Where do you live, I need to bring my Jeep I need your kind of help

[@dhzonnie]

Would this be the same on a grand Cherokee limited 4.7

[@NajarOffroad]

No I believe with the v8 you should be able to reach it from underneath the jeep

[@dhzonnie]

@@NajarOffroad thank you I found it

[@markcarpenter3600]

For the guys and gals out there who want to go dig deeper in testing the crank position sensor this video from Scanner Danner should apply to the 4.0 crank sensor. The sensor is detecting a large tone ring on the flexplate, similar to the tone ring on the ABS. The tone ring has holes spaced at different intervals to tell the computer the position of the crank. kzbin.info/www/bejne/gIjJlXuOgZKVhsk

[@freddielaboyirizarry6474]

Bueno presentar el vídeo pero no se ve de dónde sacan las pueda que quitan uno quiere saber de dónde salen y que el vídeo también lo tengan en español

[@NajarOffroad]

Salo por atras del motor tienes que meter su mano y sacarlo por atras. El tornio se sale por el ollo atras de la carpeta

[@elie955eai]

Subbed! Btw the sensor should be STRICTLY MOPAR. Because any aftermarket sensor will fail after a month. Learned that the hard way with mine.

[@NajarOffroad]

I read about that but I just went with what oriellys had hopefully I’m lucky and it lasts😂

[@robertphillips4423]

@@NajarOffroad any update on how long it’s lasted so far?

[@BillGent]

@@robertphillips4423 mine just went out again after 5 years. I had read that about how long they last when it was done the first time.

[@garsgonewild]

@@NajarOffroad how has it done

[@martinrojas2187]

What’s the socket size u used to removed the screw?

[@wolfmodz2377]

Idk but I need that answer now

[@kainhall]

@@wolfmodz2377 get out your socket set Find one that fits . You are an adult You don't need to be told everything . Do I need to tell ya how to wipe after you take a dump??

[@maniacalmonster2293]

Wouldnt this throw a code tho?

[@vduber03]

If you cycle your key on and off 3 times fast, ur odometer will give you the faults. I just replaced mine because I had a p0320 fault.

[@NajarOffroad]

I don’t remember having a check engine light on though

[@vduber03]

@@NajarOffroad mine didn't either but during the crank no start condition the crank sensor goes into "no output signal" condition and of u check it that way, the ecm will give u a dtc my cel wasn't on either

[@NajarOffroad]

That’s good to know that it will still give you the code!

[@vduber03]

@@NajarOffroad PRO TIP lol

[@howardmoses6280]

​

[@edgarnoejaime]

I got a cuestión?? What brand is the sensor??

[@NajarOffroad]

I am unsure I think I bought it from autozone

[@derkwayne1833]

Next time you should record you actually removing and replacing the part instead of vaguely describing after you're done. Would be much more helpful.

[@NajarOffroad]

Yes sir I’ve been improving the videos! Was kinda just learning and forgot to record

[@Binho2909]

@@NajarOffroad Hello Najar, I sent you a message on Instagram. Waiting for your reply, thanks

[@Veldkamp88]

I have a feeling I have this issue

[@REPDAT5SIX2]

So did you have the problem again till this day?

[@NajarOffroad]

No problems since I replaced the sensor

[@REPDAT5SIX2]

@@NajarOffroad I need to change mine ASAP every time I hit a bump or a dip it'll turn off. I usually hit the fuse box by the battery and pull the negative and positive cables once or a few time and it'll start back up.

[@el_maravillox0224]

Can some one help me I have a 2002 Jeep same model as the video it will crank stay started for 2-5 second then shut off 😭

[@cindycarroll8572]

Your key is not programmed.

[@mickeybaker7877]

@@cindycarroll8572 or the battery in the key is dead, replace battery in the key make sure the little key sign on right top of speedometer housing come's on when key is in the acc position and then goes off before you crank engine.

[@Nord3202]

Was that crankshaft sensor from O'Reilly's made in China. Looking for one not made in China.

[@NajarOffroad]

I’m not sure but hasn’t failed yet 😂

[@OSDCrusher]

Always good to replace parts without any diagnostics or testing

[@ryansrepairs]

It's a common failure point on Heeps, and doesn't throw a code (because chrystler)

[@NajarOffroad]

😂 kinda hard to test without any codes knowing I had a good battery and started

[@TimeforBatman]

What year is the jeep

[@TimeforBatman]

I have a 1998 would it be the same place?

[@NajarOffroad]

Mine is a 2002

[@roywilliams9557]

2003

[@JavierHernandez-tg3cv]

Se vende cheroki99

[@296jacqi]

This thing is such a pain in the ass I gave up. I don’t have help or 3 hands, so I’m taking it in. It’s not worth the frustration to me. I’ve done starters, alternators, brakes and 100 other things, but this sensor has beaten me.

[@NajarOffroad]

😂 it was but yea doing it alone I don’t think I could have finished it

[@dakotadriggers8838]

You can do it alone, drop the transmission crossmember and let it lean back as far as possible. Then you should be able to get at it with a long extension

[@stevenhunt1594]

Took me about 45 min

[@NajarOffroad]

Not bad!

[@jean-pierrehall2914]

Hey Steven did you need two people as suggested in video? Peace

[@xmo552]

Steven , did you go from below ?

[@princemarcel]

I had to do this myself last year. No help. One of the worst solo jobs ever. If you ever need to do this... you’ll need 2 ppl.

[@NajarOffroad]

I 100% agree! I doubt I could have done it alone in a day😂

[@johnharrison2466]

Clear that old code

[@marcmcpherson909]

Funny how you dont show any of the actual process but say its easy after each step.

[@NajarOffroad]

Yea pretty funny 😂

[@tonycontreras9578]

For God's sake hold the camera still, man!

[@markcarpenter3600]

20" extension with a short wobble extension (not a swivel) can get to this bolt from below. I can't remember the size, but it is an SAE bolt, not metric. The ratchet end of the extension will be near the transfer case. The cardboard sticker on the tip of the sensor is essential, it sets the depth of the sensor. This is not a junkyard part, spend the extra money and get from the dealer. This is one of the parts that you want new and genuine OEM. My local jeep dealer has the cardboard stickers. If I remember correctly removing the front driveline may be helpful. This is one of the sensors that I carry on the trail along with all of the throttle body sensors and the cam position sensor. Something you have to do when you're in DVNP 5 hours from the edge of pavement. My 200 mile AAA tow plan is as worthlessas the paper it is written on here. It can be replaced in about an hour on the trail. If the engine and transmission are separated it has to come out before and be replaced after they are joined. kzbin.info/www/bejne/rKvFaaybf7-Gh7s kzbin.info/www/bejne/b4eZmJuZlt5mppo P.S. it is a one man job LOL!

[@NajarOffroad]

Can definitely be done one person but it’s so much easier with two😂 I would suggest just cut the floorboard and make it easier on yourself! But carrying those sensors are a great idea! Will definitely buy some backups for the trails

[@markcarpenter3600]

@@NajarOffroad I cross deep water. And it is pretty easy from the bottom, once you know what to look for its right there. Just need a long extension.

[@darkmachine165]

Did the job entirely alone no need for 2 people.

[@richarddumag9771]

I replaced the CPS on my 2004 Jeep Grand Cherokee Laredo today. I watched this video and few others before doing the work. I used a 18 inch long extension and universal joint with the 1/4 rachet and 11 inch socket. I did the work from under the Jeep and under the hood. It took me about 30 mins to remove the old sensor and install the new one. Even though have small hands and skinny arms it was still a lot of work trying to get the right position with the hands and arms.

[@dadsgonenuts]

Thank you

[@dadsgonenuts]

Okay sorry I forgot what your name was but we did exactly what you did in the video and change that crank positioning sensor and the Jeep is still doing the same thing, what would be the next thing to do ?