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06-17-2010, 08:43 PM
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#15
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Senior Member
Join Date: Feb 2003
Location: Jarrell, TX 76537
Posts: 4,501
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I went to the Denso Site and looked in their Xref file.
Code:
Manufacturer Part Type Interchange Part Number DENSO Part Number
GM Oxygen Sensor 25312184 234-4012
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Dale
AKA - Oemy
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06-17-2010, 08:59 PM
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#16
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Moderator Emeritus
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,641
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Thanks Dale!
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
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06-18-2010, 06:30 AM
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#17
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Senior Member
Thor Owners Club
Join Date: May 2006
Posts: 1,122
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Quote:
Originally Posted by DriVer
Yes that is correct, there are 2 O2 sensors - one in each downpipe.
I'll get back to you tomorrow, I don't have those number in front of me at the moment....
The GMC / Chevy dealer will have those and they could be Delco units. It's their motor.
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Thanks Mike..I have been to many parts shops..called GM parts...tried to contact WH company service tech..many answers...different crossovers...what a goat rope..
Assistance from you (cutting to the bone) is very appreciated.
Charlie
__________________
Pubtym, 20th SOS "Green Hornet" , Viet Nam 68-69,
2015 Thor A.C.E 29.3
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06-18-2010, 06:35 AM
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#18
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Senior Member
Thor Owners Club
Join Date: May 2006
Posts: 1,122
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Baffled
Quote:
Originally Posted by oemtech
I went to the Denso Site and looked in their Xref file.
Code:
Manufacturer Part Type Interchange Part Number DENSO Part Number
GM Oxygen Sensor 25312184 234-4012
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Thanks Dale. I tried match up of GM 25312184 and it is a 4 wire connector. OE Denso is three wire..???
Went to CarQuest Auto and they crossed Denso # to 25312184...but it's a mismatch of connectors to OE.
3 wire-4 wire has me baffled.
Charlie
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Pubtym, 20th SOS "Green Hornet" , Viet Nam 68-69,
2015 Thor A.C.E 29.3
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06-18-2010, 06:43 AM
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#19
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Senior Member
Thor Owners Club
Join Date: May 2006
Posts: 1,122
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Sensor calibrations: accuracy?
Quote:
Originally Posted by JonBrazel
Pretty straight forward install...just follow the manifolds down and where they start to bend you will see a sensor screwed into a bung. 13/16" open end wrench takes the sensor out, you will want to disconnect the sensor from the wiring harness before unscrewing the sensor. The connector is held in place with a blue catch that slides out and then just lift the tab on the connector and it will slip right off the harness connection.
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Jon,
Did you find quality-calibration issues with 02 sensors?
Charlie
__________________
Pubtym, 20th SOS "Green Hornet" , Viet Nam 68-69,
2015 Thor A.C.E 29.3
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06-18-2010, 08:41 AM
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#20
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Senior Member
Thor Owners Club
Join Date: May 2006
Posts: 1,122
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Quote:
Originally Posted by Pubtym
Thanks Dale. I tried match up of GM 25312184 and it is a 4 wire connector. OE Denso is three wire..???
Went to CarQuest Auto and they crossed Denso # to 25312184...but it's a mismatch of connectors to OE.
3 wire-4 wire has me baffled.
Charlie
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Hmmmmm?
__________________
Pubtym, 20th SOS "Green Hornet" , Viet Nam 68-69,
2015 Thor A.C.E 29.3
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06-18-2010, 09:01 AM
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#21
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Moderator Emeritus
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,641
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Quote:
Originally Posted by Pubtym
3 wire-4 wire has me baffled.
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I'm still working this case for you. I know that the modular connector at the HO2S (Heated O2 Sensor) connector at the sensor has 5 sockets but only 4 positions are used. I was told that it's easy to cross reference to the pickup truck sensors but you do not want to use those.
I'm exhausted reading about O2 sensors .. I will get to the bottom of this today.
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
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06-18-2010, 09:17 AM
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#22
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Senior Member
Thor Owners Club
Join Date: May 2006
Posts: 1,122
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Quote:
Originally Posted by DriVer
I'm still working this case for you. I know that the modular connector at the HO2S (Heated O2 Sensor) connector at the sensor has 5 sockets but only 4 positions are used. I was told that it's easy to cross reference to the pickup truck sensors but you do not want to use those.
I'm exhausted reading about O2 sensors .. I will get to the bottom of this today.
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Welcome to the goat rope I found myself in too..
Thanks,
Charlie
__________________
Pubtym, 20th SOS "Green Hornet" , Viet Nam 68-69,
2015 Thor A.C.E 29.3
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06-18-2010, 09:37 AM
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#23
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Senior Member
Join Date: Feb 2003
Location: Jarrell, TX 76537
Posts: 4,501
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My 83 Monte Carlo SS only has a SINGLE... It depends on the heat from the exhaust to get hot enough to get out of Open Loop so the O2 sensor controls things. This type of sensor must be mounted high up in the exhaust system to work.
In the case of the 8.1 the O2 sensors are mounted down stream, therefore they must be "heated" to get the engine out of open loop once the engine reaches operating temp. I would suspect that a 3 wire system is Signal, Ground and 12v.
All the part numbers that I have from various Workhorse documents are 4 wire.
I am sure that Workhorses parts supplier "Uptime Parts" (an oxymoron) would have this item in stock. Now, the cost and getting to you is whole other matter.
__________________
Dale
AKA - Oemy
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06-18-2010, 10:06 AM
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#24
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Moderator Emeritus
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,641
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In my research this morning I have seen in the Maintenance Manual that on certain gasoline engines used by Workhorse that O2 sensors are positioned Bank1 - Sensor1 and Bank 1 Sensor 2. For these engines they have an O2 sensor before and after the catalytic converter. On Both sides. B2S1 and B2S2.
This schema does not apply on 8.1L configurations but is only included as a conversation item.
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03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
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06-18-2010, 10:17 AM
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#25
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Senior Member
Thor Owners Club
Join Date: May 2006
Posts: 1,122
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Quote:
Originally Posted by DriVer
In my research this morning I have seen in the Maintenance Manual that on certain gasoline engines used by Workhorse that O2 sensors are positioned Bank1 - Sensor1 and Bank 1 Sensor 2. For these engines they have an O2 sensor before and after the catalytic converter. On Both sides. B2S1 and B2S2.
This schema does not apply on 8.1L configurations but is only included as a conversation item.
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Thanks...hold the search..When I put my reading glasses on and got under the rig..with my brain connected..there are four wires into the Denso 02 sensor...
I'll look farther up on engine to see if there is another set of 02 sensors up pipe near the bank..I still have glasses on..
__________________
Pubtym, 20th SOS "Green Hornet" , Viet Nam 68-69,
2015 Thor A.C.E 29.3
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06-18-2010, 04:43 PM
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#26
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Senior Member
Official iRV2 Sponsor
Join Date: Jun 2008
Location: Centralia, WA
Posts: 1,216
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Part # 12572706
We have several in stock. The 8.1 in the WCC only has one O2 sensor per bank.
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06-18-2010, 07:24 PM
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#27
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Moderator Emeritus
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 23,641
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Quote:
Originally Posted by JonBrazel
GM/Delco Part # 12572706
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√ That's exactly the part number I obtained from my resources!
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Taylor Extremes, SGII
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
RV/MH Hall of Fame - Lifetime Member
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06-18-2010, 07:39 PM
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#28
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Senior Member
Join Date: Feb 2003
Location: Jarrell, TX 76537
Posts: 4,501
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Quote:
The O2 sensor is a 4 wire heated sensor. The following part numbers may also apply - 2533812, 2131148 & 12572706.
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As posted on my web site in the Workhorse Parts Xref.
__________________
Dale
AKA - Oemy
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