Replacing O2 sensor

pittim · 11-24-2008, 03:22 PM

My truck is throwing code P0031, Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1.) All I do is unbolt and unplug the old one and replace with the new one correct? Am I able to get at it from under the truck (03 V6 manual) easily or do I have more work ahead of me?

tacomaman06 · 11-24-2008, 03:26 PM

Quote:

Originally Posted by pittim

My truck is throwing code P0031, Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1.) All I do is unbolt and unplug the old one and replace with the new one correct? Am I able to get at it from under the truck (03 V6 manual) easily or do I have more work ahead of me?

should be easy enough to get to. you may wanna get some pb blaster and spray on the threads and let it sit for a little while..........those threads can get kinda rusty and be an ass to get off. you also may wanna get an o2 sensor socket.....they have a slot cut into them so you can get it over the o2 sensor easier............thats only if you dont have one already. other than that........unscrew,unplug, then install the new one.

HerNameIsLucy · 11-24-2008, 03:29 PM

the PB blaster is an excellent idea, esp. if there's rust. but wipe it off before you put the new one in. if it gets in the new sensor it'll hose it.

tacomaman06 · 11-24-2008, 03:32 PM

Quote:

Originally Posted by HerNameIsLucy

the PB blaster is an excellent idea, esp. if there's rust. but wipe it off before you put the new one in. if it gets in the new sensor it'll hose it.

yeah...i shoulda added to clean it off before installing the new one.

pittim · 11-24-2008, 03:56 PM

Thats the sensor from Denso that I'll be getting. Looks like I don't have to screw it in ya? So just spray down the bolts with PB Blaster, unscrew and unplug, wipe off the area that I sprayed down, then drop the new one in and just bolt and plug back in.

Seems simple enough...

HerNameIsLucy · 11-24-2008, 04:04 PM

yup, 1st gens use two bolts to attach it. not sure about 2nd gens.

my haynes suggests you run the engine a little before you break the bolts loose, get the pipe good and warm but not hot enough to burn yourself. guess it helps loosen things.

also from experience you'll want to disconnect the battery for a few minutes after you replace it, or find a OBD scantool and erase the stored code in the ECU.

AUDITECH · 11-24-2008, 04:05 PM

Yes dont plug it in until you install it you dont want to twist the wires.

dud122 · 11-24-2008, 04:24 PM

i had a check engine light come on and my mechanic said it was the air fuel sensor and it was bank 1 sensor 1... are we talking about the same thing?

pittim · 11-24-2008, 04:31 PM

Quote:

Originally Posted by dud122

i had a check engine light come on and my mechanic said it was the air fuel sensor and it was bank 1 sensor 1... are we talking about the same thing?

Yep, the O2 sensor is the thing that sends the ECU the "contents" of the exhaust so that the ECU can adjust the air/fuel ratio.

pittim · 11-24-2008, 04:37 PM

Ok, should I get Bosch or Denso?

URD has the Denso for ~$185 shipped, and Advance Auto has the Bosch for $205. My parents want me to do it at home (I'm home till Sunday) so I'd have to get the thing shipped, so the Denso from URD would end up costing around $200.

HerNameIsLucy · 11-24-2008, 04:41 PM

OEM is Denso.

Rockauto has them for $146. www.rockauto.com

bought from them several times, even had to return something i screwed up ordering on...never a problem.

pittim · 11-24-2008, 04:48 PM

Oh wow, Rock Auto has the Denso with next day shipping for $160!

HerNameIsLucy · 11-24-2008, 04:50 PM

yer welcome

EDIT: If you can wait a little while RockAuto is constantly sending me 10% off codes, I'd give you one.

pittim · 11-24-2008, 05:01 PM

Quote:

Originally Posted by HerNameIsLucy

yer welcome

EDIT: If you can wait a little while RockAuto is constantly sending me 10% off codes, I'd give you one.

While I appreciate the offer, you already saved me $40! Plus I found a 5% off coupon online.

Just ordered it for $154 with overnight shipping. Lucy, you ROCK!

Janster · 11-24-2008, 06:16 PM

Here's a writeup. I took the shifter boots off (manual) to get to the wiring.

http://www.lieblweb.com/tacoma/Mecha...placement.html

HerNameIsLucy · 11-24-2008, 06:25 PM

DO NOT try the wire/paper clip to get the code(s) that page talks about on an 03. That only works on OBD-I vehicles. You'll fry something on the OBD-II vehicles (95 and up on Toyota).

pittim · 11-24-2008, 06:35 PM

Should I reset my CEL before or after replacing the O2 sensor?

HerNameIsLucy · 11-24-2008, 06:36 PM

after.

Janster · 11-24-2008, 11:42 PM

Quote:

Originally Posted by HerNameIsLucy

DO NOT try the wire/paper clip to get the code(s) that page talks about on an 03. That only works on OBD-I vehicles. You'll fry something on the OBD-II vehicles (95 and up on Toyota).

I did it on my 96 and it worked

11-24-2008, 03:22 PM	#1
pittim College. Joined: May 2008, #6939 Location: Pittsburgh/Erie Age: 19 Gender: Guy Posts: 688 03 TRD XCab Manual V6 2003 Access Cab Manual 3.4 V6 Uniden PRO520XL CB, Grey wire	Replacing O2 sensor My truck is throwing code P0031, Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1.) All I do is unbolt and unplug the old one and replace with the new one correct? Am I able to get at it from under the truck (03 V6 manual) easily or do I have more work ahead of me? __________________

11-24-2008, 03:29 PM	#3
HerNameIsLucy Chemical Disaster Master Joined: Jul 2008, #8256 Location: Slowcala, Floriduh Age: 49 Gender: Male Posts: 1,543 02 Prerunner V6 SR5 extended cab 2002 Xtra Cab Automatic 3.4 lotsa little stuff	the PB blaster is an excellent idea, esp. if there's rust. but wipe it off before you put the new one in. if it gets in the new sensor it'll hose it. __________________ 2009. Ok, now what?

11-24-2008, 03:56 PM	#5
pittim College. Joined: May 2008, #6939 Location: Pittsburgh/Erie Age: 19 Gender: Guy Posts: 688 03 TRD XCab Manual V6 2003 Access Cab Manual 3.4 V6 Uniden PRO520XL CB, Grey wire	Thats the sensor from Denso that I'll be getting. Looks like I don't have to screw it in ya? So just spray down the bolts with PB Blaster, unscrew and unplug, wipe off the area that I sprayed down, then drop the new one in and just bolt and plug back in. Seems simple enough... __________________

11-24-2008, 04:04 PM	#6
HerNameIsLucy Chemical Disaster Master Joined: Jul 2008, #8256 Location: Slowcala, Floriduh Age: 49 Gender: Male Posts: 1,543 02 Prerunner V6 SR5 extended cab 2002 Xtra Cab Automatic 3.4 lotsa little stuff	yup, 1st gens use two bolts to attach it. not sure about 2nd gens. my haynes suggests you run the engine a little before you break the bolts loose, get the pipe good and warm but not hot enough to burn yourself. guess it helps loosen things. also from experience you'll want to disconnect the battery for a few minutes after you replace it, or find a OBD scantool and erase the stored code in the ECU. __________________ 2009. Ok, now what?

11-24-2008, 04:37 PM	#10
pittim College. Joined: May 2008, #6939 Location: Pittsburgh/Erie Age: 19 Gender: Guy Posts: 688 03 TRD XCab Manual V6 2003 Access Cab Manual 3.4 V6 Uniden PRO520XL CB, Grey wire	Ok, should I get Bosch or Denso? URD has the Denso for ~$185 shipped, and Advance Auto has the Bosch for $205. My parents want me to do it at home (I'm home till Sunday) so I'd have to get the thing shipped, so the Denso from URD would end up costing around $200. __________________

11-24-2008, 04:05 PM	#7
AUDITECH Carolina Alliance: LAZY DIVISION Joined: Feb 2007, #875 Location: charlotte nc Posts: 381 07 double cab prerunner Automatic 4.0 none	Yes dont plug it in until you install it you dont want to twist the wires.

11-24-2008, 04:24 PM	#8
dud122 Member Joined: Nov 2008, #10566 Location: Watkins Glen, NY Gender: Male Posts: 71 02 Tacoma DC 2002 Double Cab Automatic 3.4l V6 Deck Plate, Grey Wire, AFE Pro Dry S Drop-In	i had a check engine light come on and my mechanic said it was the air fuel sensor and it was bank 1 sensor 1... are we talking about the same thing?

11-24-2008, 04:41 PM	#11
HerNameIsLucy Chemical Disaster Master Joined: Jul 2008, #8256 Location: Slowcala, Floriduh Age: 49 Gender: Male Posts: 1,543 02 Prerunner V6 SR5 extended cab 2002 Xtra Cab Automatic 3.4 lotsa little stuff	OEM is Denso. Rockauto has them for $146. www.rockauto.com bought from them several times, even had to return something i screwed up ordering on...never a problem. __________________ 2009. Ok, now what?

11-24-2008, 04:48 PM	#12
pittim College. Joined: May 2008, #6939 Location: Pittsburgh/Erie Age: 19 Gender: Guy Posts: 688 03 TRD XCab Manual V6 2003 Access Cab Manual 3.4 V6 Uniden PRO520XL CB, Grey wire	Oh wow, Rock Auto has the Denso with next day shipping for $160! __________________

11-24-2008, 04:50 PM	#13
HerNameIsLucy Chemical Disaster Master Joined: Jul 2008, #8256 Location: Slowcala, Floriduh Age: 49 Gender: Male Posts: 1,543 02 Prerunner V6 SR5 extended cab 2002 Xtra Cab Automatic 3.4 lotsa little stuff	yer welcome EDIT: If you can wait a little while RockAuto is constantly sending me 10% off codes, I'd give you one. __________________ 2009. Ok, now what?

11-24-2008, 06:16 PM	#15
Janster Pre Senior Citizen Joined: Mar 2007, #1138 Location: Lancaster, PA Age: 41 Gender: Female Posts: 2,907 2007 4.0L 4x4 TRD Sport Access Cab A 2007 Access Cab Automatic 4.0L Advantage Torza top (tri-fold), Husky floor mats, RuffTuff seat covers, C2C hood struts, Homelink mirror, Ipod2car (80gig Classic/4gig nano), Garmin Nuvi 660, Protecta Bed mat, Pop-n-lock, TSB Springs, Scangauge II, Heated drivers seat, Fumoto drain valve, Aries pushbar, PIAA 540 fog lights, Hood scoop grahics, Flowmaster 50 series dual catback exhaust.	Here's a writeup. I took the shifter boots off (manual) to get to the wiring. http://www.lieblweb.com/tacoma/Mecha...placement.html __________________ Our Homepage http://www.lieblweb.com/ My truck photo gallery http://www.lieblweb.com/cpg/thumbnails.php?album=16

11-24-2008, 06:25 PM	#16
HerNameIsLucy Chemical Disaster Master Joined: Jul 2008, #8256 Location: Slowcala, Floriduh Age: 49 Gender: Male Posts: 1,543 02 Prerunner V6 SR5 extended cab 2002 Xtra Cab Automatic 3.4 lotsa little stuff	DO NOT try the wire/paper clip to get the code(s) that page talks about on an 03. That only works on OBD-I vehicles. You'll fry something on the OBD-II vehicles (95 and up on Toyota). __________________ 2009. Ok, now what?

11-24-2008, 06:35 PM	#17
pittim College. Joined: May 2008, #6939 Location: Pittsburgh/Erie Age: 19 Gender: Guy Posts: 688 03 TRD XCab Manual V6 2003 Access Cab Manual 3.4 V6 Uniden PRO520XL CB, Grey wire	Should I reset my CEL before or after replacing the O2 sensor? __________________

11-24-2008, 06:36 PM	#18
HerNameIsLucy Chemical Disaster Master Joined: Jul 2008, #8256 Location: Slowcala, Floriduh Age: 49 Gender: Male Posts: 1,543 02 Prerunner V6 SR5 extended cab 2002 Xtra Cab Automatic 3.4 lotsa little stuff	after. __________________ 2009. Ok, now what?