Has anybody done this (replaced all 4) themselves? And if so how difficult is it? I have the suggested NGK sensors but just looking for a little guidance to attack it as I have 105,000 miles on my WK and the sensors are the original ones and they seem to be the likely suspects killing my MPGs. I've cleaned my throttle body, replaced my MAP sensor, replaced IAT sensor, replaced EGR valve (which definitely helped with acceleration), KandN air filter, changed all 16 spark plugs within the past 5000 miles. All of this and I'm still getting 9.5-10 mpgs. Next is the TPS sensor and the O2 sensors. So who's done it?
I just replaced the Y pipe assy on mine ( what a *****! ).
I had a P0430. O2 sensors supposedly were working, but after swapping the cat assy, the code was still there. I ended up replacing both after cat sensors even though it was the right one. However, removing all the sensors from the old pipe to the new one required heating up and watch out for mashed threads. Two of them were saved thanks to some swiss filing.
Just a FYI....the was a detonation in the right side cat (from months ago which destroyed it) which is why the rear sensor was not reading correctly.
Use the factory ones. They just happened to be the cheapest in my area.
~ 2005 Jeep Grand Cherokee Limited 5.7 V8 with 5 spd Auto and Quadra-Drive II full-time Active 4WD ~
Last edited by Nightcrawler; 01-07-2012 at 05:15 AM..
Reason: added more information
Billy, the job is easy, but it is hard. You may need an O2 sensor wrench, as they are probably real tight. I have a complete custom exhaust, so mine is not like the stock ones. Mine were pretty easy to do. I am told that the front passenger side one is very difficult to get the plug off and remove. Once you get them out, just be careful not to contaminate the new ones. If you haven't already, may I suggest you read the thread I did on O2 sensors when I had one going bad.
Thanks 90grandwagoneer but I already have many times as I keep referring back to it haha and each time find it very informative. Update: I have been able to replace the driver's side bank both before and after the left side cat (with many cuts on my hands but it looks cool because everyone thinks I got in a fistfight which I kinda did haha) but haven't had any luck with the passenger side bank yet due to snowboarding trips, work, school and well shortage of time but I hope to somewhat make an attempt it again this weekend. I originally was just wondering if anyone had any time-saving tips in reaching the passenger plugs since it's such a pain in the ***! Hope to get this in the past very soon!
Wow, you're lucky if you have snow nearby. We're dry as can be and no real snow in sight. It's killing the resorts here. Good luck on the passenger side. I understand it's much worse than the driver's side. I've heard that it's easier to cut the wire on the old (front) sensor, near the sensor, and then remove the sensor. You can then unplug the old sensor plug, plug in the new one and twist it (sensor and wires) counterclockwise, insert the sensor and tighten. If it's too hard to get to, you may have to remove both headpipes at the exhaust manifold, and drop it down for access. Good luck and let us know how it goes.
06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, K&N Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS Tuner, Cust tubular hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, SRT Reps with 265/45&295/40X20's.
Are the NTK (or NGK) O2 sensors from Advance Auto or Autozone the same as the ones from Chrysler?
I put new Bosch O2 sensors in my 05 GC and it's throwing a code for the O2 sensors. Then I found out the Bosch don't work well. The shop says they need to be replaced. Should I get the dealership ones or the Advance Auto ones?
I don't know about the 3.7 engines, but the early 5.7 factory ones are NTK. I had a problem with the Bosch fronts on my 5.7 immediately after installation. As soon as I swapped them over to the NTK's the problems went away. I still run the Bosch's in the after the cat. positions though. My guess is that, if you need the NTK's, the Advance Auto or Autozone ones will work fine. I am sure the stealer wants a fortune for them compared to the auto parts stores. A number of years ago, when I had this problem, I did a thread on what I learned about the O2's. FWIW, below is the ref. to it. Hope it helps a little.
Thanks for that. I had seen the post you linked to and read through it. I appreciate that. The dealer wants about $20 more for the O2 sensor, plus Advance Auto has good coupons that can make the price gap even larger. I will probably try them and see.