Chrysler Voyager & Town & Country The first and foremost name in minivans leading the class since their inception in the 1980s

O2 Sensor Replacement - Codes Wont Go Away!

  #1  
Old 02-26-2012, 11:12 PM
Junior Member
Thread Starter
Join Date: Feb 2012
Posts: 3
Default O2 Sensor Replacement - Codes Wont Go Away!

Hello everybody,

I have a 2004 Chrysler T&C with the 3.3L V6 and 120k miles. The MIL came on, I did the key dance and got P0038, Bank 1, Position 2 02 Sensor Heater voltage out of range high. O2 sensors have never been replaced.

I googled, and despite wading through a sea of poor and disjointed information (sometimes I wonder if bots are doing some of those write-ups) I decided to replace the downstream O2 sensor. Pulled it out (it's an NTK) and did not see any obvious trauma. Replaced it with a Bosch as the dealership was closed today and it was all the local parts stores have on hand. Put it all back together today and started drive cycles. MIL would not go off. I thought disconnecting the battery and draining anything residual would wipe the DTC and turn off the MIL - it did not. I used a scan tool to clear the codes and turn off the MIL, but it came back on within seconds. The second time I cleared the code, the MIL never turned off. The codes are P0038 and P0038 (pending).

My thought is that even if it is a sensor fault, it would take the PCM one trip to logic that out, issue a DTC, and set the MIL, so I'm confused as to why the code can't even be cleared.

My next step is to try an OEM O2 sensor, but other than that I'd like to hear from some of you all. I read the service manual. At some point today on the internet I saw a flow chart for going at this issue systematically, but for the life of me I can't find it.

Thank you!
 
  #2  
Old 02-26-2012, 11:20 PM
CHRYSLER TECH's Avatar
Super Moderator
Join Date: Mar 2006
Location: Norcross GA
Posts: 8,108
Default

put the oem sensor in first then go from there
 
  #3  
Old 02-26-2012, 11:44 PM
TNtech's Avatar
Senior Member
Join Date: Jul 2010
Location: Tennessee
Posts: 1,234
Default

Originally Posted by BringTheTrain View Post
Hello everybody,

....Replaced it with a Bosch.....
There's your problem >>>>> Found a TON of them with open heater circuit right out of the box. I can't tell you how many arguements i've had with customers and independent shops because they don't believe it. They always lose. This has been going on for at least 3 years and I am still running across them regularly.
 

Last edited by TNtech; 02-26-2012 at 11:48 PM.
  #4  
Old 02-27-2012, 12:55 AM
Senior Member
Join Date: Aug 2010
Location: Central New York
Posts: 109
Default

I have heard about the Bosch O2 sensor problems right out of the box as well. Try a Denso or NTK if you don't want to get raped by the parts guy's at the dealer.
 
  #5  
Old 02-27-2012, 02:12 PM
Junior Member
Thread Starter
Join Date: Feb 2012
Posts: 3
Default

Okay, swapped out the O2 sensor for a factory part - same result. Clear the codes, start the car, MIL comes on almost immediately. Same codes thrown.
 
  #6  
Old 02-27-2012, 04:29 PM
TNtech's Avatar
Senior Member
Join Date: Jul 2010
Location: Tennessee
Posts: 1,234
Default

Originally Posted by BringTheTrain View Post
I read the service manual.
By this statement, one would assume you did your diagnostic tests already. Did you?
 
  #7  
Old 02-28-2012, 01:32 AM
Junior Member
Thread Starter
Join Date: Feb 2012
Posts: 3
Default

I think I have it figured out. With the hard fault I became suspicious of the wiring. (I don't have a tester here...First mistake). After carefully threading my hands in there, something I couldn't really see didn't feel right. I had to cut open the conduit to get at it. I found one severed and one frayed wire between the harness and the female connector. No idea how that would have happened. Cutting, stripping, splicing, and crimping in that space is a real pain. The MIL is out, no codes stored for now.
 
  #8  
Old 02-28-2012, 08:29 AM
TNtech's Avatar
Senior Member
Join Date: Jul 2010
Location: Tennessee
Posts: 1,234
Default

Originally Posted by BringTheTrain View Post
Cutting, stripping, splicing, and crimping in that space is a real pain. .
Yeah that's a bad place down there on the mount.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jfizzle
Chrysler 200 & Sebring
12
03-06-2019 04:02 PM
ruttrow
Chrysler 200 & Sebring
2
05-02-2010 09:20 PM
gcap_rider
Chrysler 200 & Sebring
5
12-02-2008 08:54 PM
nmason
Chrysler 200 & Sebring
4
03-15-2007 12:17 AM
dudeofwheels
General Tech
1
12-08-2006 02:08 AM


Thread Tools
Search this Thread
Quick Reply: O2 Sensor Replacement - Codes Wont Go Away!


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.