Mike "Wuzzy121". Rest in peace, brother

Go Back   Tacoma World Forums > Tacoma Garage > Technical Chat

Notices

Help needed for a live reading of rear o2 sensor (bank 1 sensor 2)

Reply
 
Thread Tools Search this Thread
Old 11-18-2011, 11:10 AM   #1
geoff06 [OP] geoff06 is offline
Senior Member
geoff06 is a jewel in the roughgeoff06 is a jewel in the roughgeoff06 is a jewel in the rough
 
geoff06's Avatar
Joined: Feb 2011, #50697
Location: WI
Gender: Male
Posts: 255
geoff06's Tacoma Gallery
Help needed for a live reading of rear o2 sensor (bank 1 sensor 2)

I have a 219k '01 xtracab 2.7l. I've been getting a CEL with a p0136 code (oxygen sensor malfunction, bank 1 sensor 2) for the last 2 weeks. I have reset the codes/ecu 3-4 times and the codes keep coming back. The only consistency regarding when the CEL comes on is when I have about 3 gallons of gas left. At first I thought the light was only coming on when doing 67mph+/2200rpm, but it just came on while doing about 30mph.

I went to my buddy's house and he got a live reading of exhaust/emissions flow with his scan tool and we noticed something that didn't look right- the reading for the upstream o2 sensor was hovering around 3.2xx but the reading for the downstream 02 sensor just said "0" and didn't change, which seemed suspicious. I have a URD o2 "simulator" (which is basically a conditioner, working in conjunction with the downstream o2 sensor) with one cat and until now, my truck has been running absolutely amazingly since I installed it 3 months ago.

Ok that's all the info that I can think of. My question is this-- can somebody please get a live reading from their 01-04 Taco and tell me what that number for a functioning downstream o2 sensor is supposed to be? I don't wanna waste my time and money replacing an oxygen sensor that still works (yeah yeah, I know, it's a freaking high mileage sensor and definitely most likely the problem, but money is tight and I wanna know everything I can before going out in the freezing cold to work on my truck)

Thanks guys!
  Reply With Quote
Old 11-18-2011, 04:39 PM   #2
Senior Member
BUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shedBUZZCUT is one of the sharper tools in the shed
Air Force: KC-135A/R Crew Chief NKAWTG
Joined: Mar 2011, #52417
Gender: Male
Posts: 528
BUZZCUT's Tacoma Gallery
Quote:
Originally Posted by geoff06 View Post
I have a 219k '01 xtracab 2.7l. I've been getting a CEL with a p0136 code (oxygen sensor malfunction, bank 1 sensor 2) for the last 2 weeks. I have reset the codes/ecu 3-4 times and the codes keep coming back. The only consistency regarding when the CEL comes on is when I have about 3 gallons of gas left. At first I thought the light was only coming on when doing 67mph+/2200rpm, but it just came on while doing about 30mph.

I went to my buddy's house and he got a live reading of exhaust/emissions flow with his scan tool and we noticed something that didn't look right- the reading for the upstream o2 sensor was hovering around 3.2xx but the reading for the downstream 02 sensor just said "0" and didn't change, which seemed suspicious. I have a URD o2 "simulator" (which is basically a conditioner, working in conjunction with the downstream o2 sensor) with one cat and until now, my truck has been running absolutely amazingly since I installed it 3 months ago.

Ok that's all the info that I can think of. My question is this-- can somebody please get a live reading from their 01-04 Taco and tell me what that number for a functioning downstream o2 sensor is supposed to be? I don't wanna waste my time and money replacing an oxygen sensor that still works (yeah yeah, I know, it's a freaking high mileage sensor and definitely most likely the problem, but money is tight and I wanna know everything I can before going out in the freezing cold to work on my truck)

Thanks guys!

That sensor is junk.

The sensor in question won't cause drive-ability problems. It is there to monitor the efficiency of the converter. the light will return every time you reset it due to the sensor being junk. Until you pull the light bulb the light will shine. You change the sensor it should stay off unless you have other codes.
  Reply With Quote
Old 11-19-2011, 08:51 PM   #3
geoff06 [OP] geoff06 is offline
Senior Member
geoff06 is a jewel in the roughgeoff06 is a jewel in the roughgeoff06 is a jewel in the rough
 
geoff06's Avatar
Joined: Feb 2011, #50697
Location: WI
Gender: Male
Posts: 255
geoff06's Tacoma Gallery
Yeah after typing that I realized that there probably wasn't even much point in asking the question, cuz all the evidence points to a fried sensor. Starts with a p0136 then the infamous p0420 bbq'd gato code shows up after a while, which can be/is a result of the 136. I just reset the ECU to see if the same code(s) would show up each time, and they did. Ha, yeah I know, I'm paraniod and ocd, but whatever. So, on to ordering a new o2 sensor for myself...
Thanks
  Reply With Quote
Old 11-19-2011, 08:54 PM   #4
Senior Member
joes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shedjoes06tacoma is one of the sharper tools in the shed
Name: Joe
Joined: Jan 2010, #28588
Location: Central Coast, CA
Gender: Male
Posts: 3,073
joes06tacoma's Tacoma Gallery
Quote:
Originally Posted by geoff06 View Post
Yeah after typing that I realized that there probably wasn't even much point in asking the question, cuz all the evidence points to a fried sensor. Starts with a p0136 then the infamous p0420 bbq'd gato code shows up after a while, which can be/is a result of the 136. I just reset the ECU to see if the same code(s) would show up each time, and they did. Ha, yeah I know, I'm paraniod and ocd, but whatever. So, on to ordering a new o2 sensor for myself...
Thanks
Can you swap the sensor with one of the other ones on the truck and see if the sensor readings change? If nothing changes you may have a wiring problem.
  Reply With Quote
Old 11-29-2011, 04:49 PM   #7
Junior Member
HuckleSmothered is on a distinguished road
Joined: Nov 2011, #66740
Gender: Male
Posts: 21
HuckleSmothered's Tacoma Gallery
Did that O2 sensor fix the error code?
  Reply With Quote
Old 11-30-2011, 04:57 AM   #8
Senior Member
Gadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shedGadget@URD is one of the sharper tools in the shed
Joined: Sep 2008, #9183
Location: Southern Maryland USA
Posts: 610
Gadget@URD's Tacoma Gallery
Remove the URD Sim. See if the problem continues. If so, replace the sensor.

If not call URD.

URD carries the full line of Denso O2 sensors as well.

G
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
rear o2 sensor - DONE! bowyer2002 1st Gen. Tacomas 64 04-12-2014 07:00 AM
99 Tacoma 4x4 O2 Sensor Bank1 Sensor 2 GASKET?? vapovick 4 Cylinder 2 08-17-2010 05:04 PM
Part Number A/F sensor and O2 sensor derekp 1st Gen. Tacomas 4 04-07-2010 10:34 AM
3.4 coil packs, rear O2 sensor, water temp sensor glassdoc Buy / Sell / Trade 6 01-28-2009 06:51 AM
O2 Sensor (Bank One) cottonbroker Technical Chat 1 01-04-2007 09:40 PM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.