O2 Sensor Issues: Brains Needed!
Camel Trophy
Joined: Nov 2015
Posts: 3,560
Likes: 834
From: Staten Island, NY
Yeah, I was going to say that $259 seemed pretty steep.
www.amazon.com/gp/product/B01IAFTWGE/ is what I put in a couple of weeks ago for the downstreams. $44 each.
www.amazon.com/gp/product/B01IAFTWGE/ is what I put in a couple of weeks ago for the downstreams. $44 each.
TReK
Joined: Jul 2017
Posts: 3,387
Likes: 488
Yeah, I was going to say that $259 seemed pretty steep.
www.amazon.com/gp/product/B01IAFTWGE/ is what I put in a couple of weeks ago for the downstreams. $44 each.
www.amazon.com/gp/product/B01IAFTWGE/ is what I put in a couple of weeks ago for the downstreams. $44 each.
The upstream and downstream O2's are both the same/same part number?
Thanks
TReK
Joined: Jul 2017
Posts: 3,387
Likes: 488
Here is what some lightly challenging Googling has found.
* Walker makes two kinds of O2 sensors. One is "Standard", the other "Premium".
* In most cases the "Premium" level is about 20% more.
* Best price I could find for the "Premium" sensors was on Amazon.
* Upstream Premium, $40.35 each. Walker 350-34462
* Downstream Premium, $43.94 each. Walker 350-34188
Net/net to replace all four O2 sensors - $157.10
* Walker makes two kinds of O2 sensors. One is "Standard", the other "Premium".
* In most cases the "Premium" level is about 20% more.
* Best price I could find for the "Premium" sensors was on Amazon.
* Upstream Premium, $40.35 each. Walker 350-34462
* Downstream Premium, $43.94 each. Walker 350-34188
Net/net to replace all four O2 sensors - $157.10
I have an 04
Those 2 O2 sensors are listed everywhere only for 99-02
I don't want to buy them and find out the 03/04 are different, or have different plugs.
Stupid land Rover
TReK
Joined: Jul 2017
Posts: 3,387
Likes: 488
All other O2 sensors I find are for 99-04, on AB's site and video also.
I was just concerned the plugs may have changed for 03/04, but apparently not.
Amazon lists the Walker's for 99-04 as well.
I ordered the Walker O2's, $150.86, thanks again!
Beats $400+ for Bosch that may not work correctly.
I was just concerned the plugs may have changed for 03/04, but apparently not.
Amazon lists the Walker's for 99-04 as well.
I ordered the Walker O2's, $150.86, thanks again!
Beats $400+ for Bosch that may not work correctly.
Last edited by Sixpack577; May 19, 2018 at 01:07 PM.
TReK
Joined: Feb 2013
Posts: 2,514
Likes: 656
Another quality O2 sensor option is NTK
NTK O2's and NGK Spark Plugs are the only choice for me. They just perform like they should with zero issues....simple.
You can SEARCH the Ecat here > NGK Spark Plugs
Thread Starter
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Mudding
Joined: Apr 2017
Posts: 122
Likes: 3
Follow-Up.
The Walker O2 sensors got here quick. Ordered on Saturday. Arrived on Monday. USPS. Traveled from Danburry, CT to Austin, TX.
I installed them and went out for a 20 mile test drive. Truck ran great. We shall see if its still wonderful in the morning.
The Walker O2 sensors got here quick. Ordered on Saturday. Arrived on Monday. USPS. Traveled from Danburry, CT to Austin, TX.
I installed them and went out for a 20 mile test drive. Truck ran great. We shall see if its still wonderful in the morning.
Recovery Vehicle
Joined: May 2008
Posts: 811
Likes: 78
From: Howell, NJ
I will be the alternative voice here. I have 5 current Disco's (wifes, mine, daughters, off-road), so it makes it easy for me swap and troubleshot sensors, including MAF and 02.
I typically go to the u-pull-it junkyard every weekend. I have started using nothing but used OEM 4 wire 02's from low mile cars in good shape. I can usually tell when I take them out if they were any good, because they are almost white. Almost all downstream sensors are good because they almost never see excess fuel or coolant (Cat burns it off).
With an Elm327 bluetooth OBD reader and the torque android app you can read the almost realtime data off of the O2's. They should cycle regularly. You can disconnect the MAF and the O2's will still cycle if they are working. You can open a propane torch in to MAF and the 02's shoudl go rich (.9 v) if they were stuck lean. If you pull a vacuum line loose, they should go lean (.1v)if they are stuck rich. If they are faulty, they fail open (0v).
On cold start O2's should be slightly rich, and then start cycling. If they start lean and stay lean they are bad. If you get the torque app you can record the data and post it up, we can help troubleshoot from there.
I typically go to the u-pull-it junkyard every weekend. I have started using nothing but used OEM 4 wire 02's from low mile cars in good shape. I can usually tell when I take them out if they were any good, because they are almost white. Almost all downstream sensors are good because they almost never see excess fuel or coolant (Cat burns it off).
With an Elm327 bluetooth OBD reader and the torque android app you can read the almost realtime data off of the O2's. They should cycle regularly. You can disconnect the MAF and the O2's will still cycle if they are working. You can open a propane torch in to MAF and the 02's shoudl go rich (.9 v) if they were stuck lean. If you pull a vacuum line loose, they should go lean (.1v)if they are stuck rich. If they are faulty, they fail open (0v).
On cold start O2's should be slightly rich, and then start cycling. If they start lean and stay lean they are bad. If you get the torque app you can record the data and post it up, we can help troubleshoot from there.
Thread Starter
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Mudding
Joined: Apr 2017
Posts: 122
Likes: 3
More follow-up ... Got to 70.1 miles after replacing the O2 sensors, and the THREE AMIGOS came on! No engine light. Only code showing is a pending 0447 - Evaporative Emission Valve ... Thinking that's unrelated to the O2 sensors, unless I knocked-off a vacuum line while working on them.