How is it possible to lose all O2 sensors at one time?

Tech discussions for the 100-series Land Cruiser, including the Lexus 470 models. Discuss suspension, snorkels, engines and all the other tech that makes a Land Cruiser. Ask questions / give answers.

New User
Posts: 2
Joined: March 2017

Vehicle:
LX 470 2001
HAM Call Sign:
NONE
PostPosted: Wed Nov 29, 2017 3:05 pm
Hello everyone,

I have been trying to diagnose my problem with my 2001 LX 470 - 109,000 miles, since my local Toyota dealership can't replicate the problem in their service bay. 99% of the time my LX runs perfect and then all of a sudden while accelerating from a red light it will stall or start missing bad. It normally starts running fine after letting it sit for a few minutes.

"Luckily" the other night it when I was close to a handheld OB2 scanner. These first 3 pictures are of when it was missing very badly.

The other 3 pictures are when it is running perfect! The biggest difference I can tell from the pictures is that the LX 470 might be losing all of its O2 sensors at one time?

Please advise before I shoot this SUV and leave it for dead!

Btw since I was planning on keeping this LX 470 forever, in my past 6 months of ownership I have had my Toyota dealership do the following to get a baseline: new fuel cap, new air filter, new fuel filter, new timing belt, the MAF has been clean, clean throttle body, the Injectors have been clean, new spark plugs, new water pump, new belts, new alternator, radiator flushed, transmission flushed, differentials flushed and oil changed.
Attachments
Lexus LX 470 #3 Running Bad.jpg
Lexus LX 470 #2 Running Bad.jpg
Lexus LX 470 #1 Running Bad.jpg

New User
Posts: 2
Joined: March 2017

Vehicle:
LX 470 2001
HAM Call Sign:
NONE
PostPosted: Wed Nov 29, 2017 3:07 pm
This is the same code reader. This is when the LX 470 is running fine which is 99% of the time. It only stalls every so often but, with no warning.
Attachments
Lexus LX 470 #3.jpg
Lexus LX 470 #2.jpg
Lexus LX 470 #1.jpg
User avatar
Site Admin
Posts: 508
Joined: April 2012
Location: SF Bay Area
Vehicle:
2000 Land Cruiser, 2017 Land Cruiser
HAM Call Sign:
WE4RED
PostPosted: Wed Dec 06, 2017 12:05 am
KillerBox wrote:This is the same code reader. This is when the LX 470 is running fine which is 99% of the time. It only stalls every so often but, with no warning.



It would be odd to have 3 at a time act up. It may be more electrical than sensors... I would examine the wiring running to the sensors to make sure its not damaged and grounding. Also pull the plugs for each sensor and make sure they are clean and dry.

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