P0138 Oxygen Sensor Question
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Registered User
Joined: Oct 2012
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From: Hamilton Ontario Canada
P0138 Oxygen Sensor Question
Okay, I have a 2002 5.9 Durango SLT 4x4.
I am getting the P0138 code, I only have TWO oxygen sensors not four. Can anyone tell me if its the Pre or Post? I'd like to just buy one, as I went and bought two entirely wrong sensors already.
I am getting the P0138 code, I only have TWO oxygen sensors not four. Can anyone tell me if its the Pre or Post? I'd like to just buy one, as I went and bought two entirely wrong sensors already.
Hall Of Fame
Joined: Jun 2005
Posts: 14,228
Likes: 19
From: Riverton, UT
P0138 1/2 O2S Shorted To Voltage
TNtech is incorrect, as expected from a new moderator standpoint,...Sorry.
1/2 means the PRE-CAT, meaning the drivers side O2 sensor BEFORE (up steam) the CAT. So look under your truck on the down pipe under the drivers side engine exhaust manifold, and before your CAT you will see a O2 sensor. Replace it! OEM is NTK, however I and most of the Ram section buy DESNO sensors, the OEM type and they work great. NTK will work just as good, however Desno is 1/2 price on www.rockauto.com and you can search for a coupon for 5% off using google.
I would just buy both pre-cat sensors and be done with it, besides you will get them both for about $70 bucks and have the engine purring. Same price as 1 of the Bosch piece of craps.
BTW<---- Nice to meet you NTtech, you'll get used to me!
TNtech is incorrect, as expected from a new moderator standpoint,...Sorry.
1/2 means the PRE-CAT, meaning the drivers side O2 sensor BEFORE (up steam) the CAT. So look under your truck on the down pipe under the drivers side engine exhaust manifold, and before your CAT you will see a O2 sensor. Replace it! OEM is NTK, however I and most of the Ram section buy DESNO sensors, the OEM type and they work great. NTK will work just as good, however Desno is 1/2 price on www.rockauto.com and you can search for a coupon for 5% off using google.
I would just buy both pre-cat sensors and be done with it, besides you will get them both for about $70 bucks and have the engine purring. Same price as 1 of the Bosch piece of craps.
BTW<---- Nice to meet you NTtech, you'll get used to me!
Site Moderator-Dodge Tech
Joined: Sep 2010
Posts: 3,724
Likes: 22
From: Nashville, Tennessee
Bank ONE, Sensor TWO is downstream. I might be a new moderator, but I do this for a living...for 21 years. Have a nice day.
Last edited by TNtech; Nov 12, 2012 at 01:04 AM.
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
P0138 1/2 O2S Shorted To Voltage
TNtech is incorrect, as expected from a new moderator standpoint,...Sorry.
1/2 means the PRE-CAT, meaning the drivers side O2 sensor BEFORE (up steam) the CAT. So look under your truck on the down pipe under the drivers side engine exhaust manifold, and before your CAT you will see a O2 sensor. Replace it! OEM is NTK, however I and most of the Ram section buy DESNO sensors, the OEM type and they work great. NTK will work just as good, however Desno is 1/2 price on www.rockauto.com and you can search for a coupon for 5% off using google.
I would just buy both pre-cat sensors and be done with it, besides you will get them both for about $70 bucks and have the engine purring. Same price as 1 of the Bosch piece of craps.
BTW<---- Nice to meet you NTtech, you'll get used to me!
TNtech is incorrect, as expected from a new moderator standpoint,...Sorry.
1/2 means the PRE-CAT, meaning the drivers side O2 sensor BEFORE (up steam) the CAT. So look under your truck on the down pipe under the drivers side engine exhaust manifold, and before your CAT you will see a O2 sensor. Replace it! OEM is NTK, however I and most of the Ram section buy DESNO sensors, the OEM type and they work great. NTK will work just as good, however Desno is 1/2 price on www.rockauto.com and you can search for a coupon for 5% off using google.
I would just buy both pre-cat sensors and be done with it, besides you will get them both for about $70 bucks and have the engine purring. Same price as 1 of the Bosch piece of craps.
BTW<---- Nice to meet you NTtech, you'll get used to me!
hydra, you are wrong, tntech is correct, 1/2 is bank 1 sensor 2
sensor 2 is always post cat
(tntech, i know you said this already, but knowing hydra i have to post up too in order to save hassle later)
Thread Starter
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Registered User
Joined: Oct 2012
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From: Hamilton Ontario Canada
Thank you for the clarification. I ordered the correct sensor from a Canadian Tire, its the NGK brand, post cat sensor. Now I am just have trouble getting the old one off. I think I may have to just swallow my pride and take it to a shop. 