02 Ram 1500 4x4 Code 138 which sensor is bank 1, #2 - DodgeForum.com

Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > 3rd Gen Ram Tech
Log In 

3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

02 Ram 1500 4x4 Code 138 which sensor is bank 1, #2

Thread Tools Search this Thread
Old 10-21-2009, 07:04 PM
TFastle TFastle is offline
Registered User
Join Date: Oct 2009
Posts: 3
Default 02 Ram 1500 4x4 Code 138 which sensor is bank 1, #2

Engine light came on, code reader says cod PO138, Oxygen sensor bank 001, sensor 2. I have searched and read other posts but the all talk about sensors on the drivers side versus passenger. My truck is a 4.7 and there appears to be one catalytic converter and it's on the passenger side going to the single exhaust (maybe the 5.7s have dual exhaust?) also exiting on the passenger. Since it's sensor 2 my guess is it's the one behind the lone catalytic converter (there are two that I see, one before the converter and one after) but want to make sure first. Anyone here familiar with this and can advise? Thanks in advance!
Reply With Quote
Old 10-21-2009, 07:18 PM
nim81's Avatar
nim81 nim81 is offline
Record Breaker
Join Date: Nov 2006
Vehicle: 06 TRX4 QC HEMI
Location: fredericktown
Posts: 2,400

yes you are correct. it is the 2nd one
Listen.. I would never hit you with an axe.. when you had skewers stabbed through your mouth. I would figure one or the other would be enough..
5.9L truck club founder (retired)
Reply With Quote
Old 10-21-2009, 07:21 PM
lxman1's Avatar
lxman1 lxman1 is offline
Site Moderator
Dodge Forum Moderator
Join Date: May 2008
Vehicle: 2008 QC Ram BigHorn Hemi
Location: Louisville, Ky
Posts: 9,284
Send a message via AIM to lxman1

Yes, sensor two is the one behind the cat converter. If you had 2 converters like the later models, it would be behind the converter on bank 1 which is the side with cylinder #1 which is the driver side.
2008 RAM 1500 Sunburst Orange BigHorn. 5.7L HEMI
Reply With Quote
Old 10-21-2009, 08:16 PM
weedahoe's Avatar
weedahoe weedahoe is offline
Hall Of Fame
Hall of Fame Member
Join Date: Mar 2009
Vehicle: 04 Dodge Ram QC
Location: South GA
Posts: 19,153

IDK if it will help but here is that info from AllData. This is the info on P0138. That link is only good for a few days.

Reply With Quote
Old 10-23-2009, 02:09 PM
TFastle TFastle is offline
Registered User
Join Date: Oct 2009
Posts: 3

Thanks to all for the replies, very helpful. I replaced the O2 sensor behind the cat and fired it up. Check engine light was still on. Needless to say I was quite frustrated. Ultimately I got it sorted out but thought, in case someone in a similar situation reads this, I would pass along my experience. So, I figured it did not fix my problem but thought I would take a chance that it had to be driven some and brought up to temperature. After a 15 minute drive light still on. Stopped and restarted. Light still on. Then I wondered if maybe it need to be reset. Read about that and saw a few descriptions. One was that it would reset itself after a number of starts but no specific number stated (did not sound likely to me - that should have clued me in .. lol). Another was to disconnect battery for 30 minutes or so and that would reset. And the to take it to someone with a reader and have it reset. My guess was that it would reset itself immediately and hence I had not fixed it. Well, I was wrong, I went to disconnect the battery and decided to start it one last time first and the light was OFF! RIGHT ON! This was after about 5 starts and it seemed to reset itself. And I am glad. Thanks to all the responded, it was a lot of help. Have a great day!
Reply With Quote
Old 10-23-2009, 02:10 PM
TFastle TFastle is offline
Registered User
Join Date: Oct 2009
Posts: 3

PS .. this is a really cool forum.
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
1994 5.9L gas has spark and fuel but won't start herche54 2nd Gen Ram Tech 13 07-17-2015 04:38 PM
'96 P300, P301, P302 Codes Crytot 1st Gen Dakota 5 07-13-2015 05:26 PM
2004 ram 1500 question dss56 3rd Gen Ram Tech 8 07-09-2015 09:01 PM
2002 dodge neon 2.0 sohc colons3499 Dodge Neon 0 07-09-2015 03:57 PM
P0016 code please help huffp2 3rd Gen Ram Tech 0 07-07-2015 12:13 AM

oxygen sensor, po138 code

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 07:22 AM.