P0139 Becomes P0141 after new Denso Downstream sensor replacement

Asked by Jul 26, 2016 at 03:08 AM about the 2004 Dodge Dakota 4 Dr SXT Quad Cab SB

Question type: Maintenance & Repair

I was getting a recurrent code for P0139 stating that bank 1 sensor 2 had a
slow or unexpected response to ECM.  So, I replaced it with an OE Denso
sensor.  Now I have a P0141 code that states the heated oxygen heater
element has malfunctioned/failed.  This is for the exact same sensor
location, but a different code now that I have installed a new one.  What I
am trying to ask, did I get a bad O2 sensor from the store, or is there
something else going on that might be a common problem? This is on a
3.7L V6 version of the 2004 Dodge Dakota QuadCab SXT.  Thanks in
advance.

2 Answers

11,025

The DTC codes don't always mean a sensor is bad, there can be an issue in the circuit as in your case the 4 wire HEGO is signaling a no or non heat in the circuit / sensor time to inspect the connector and wiring harness the 02 can be Ok, and still have a circuit issue. The downstream sensors don't control anything, they monitor the catalytic converter temperature by means of 02 content the Upstreams are the active Major control signals of air fuel mixture in closed loop only.

The problem with diagnosing the circuit is the difficulty in getting to the connector. It is above the transmission in a tight place. This sensor seems to be directly tied in to the passenger side sensor. Is it a likely scenario that a different sensor could also be causing this code? I don't want to unhook the harness if I can help it. It's a pain in the butt to get back on in such a tight place. I may have too, but I Am hoping I can get around that.

Your Answer

Add photo

Related Questions

Dakota

Looking for a Used Dakota in your area?

CarGurus has 4,361 nationwide Dakota listings starting at $995.

ZIP:

Search Dodge Dakota Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Dodge Dakota Experts

#1 banana
banana
Reputation 980
#2 Samantha Brown
Samantha Brown
Reputation 960
#3 Snidely
Snidely
Reputation 840
View All

Related Models For Sale

Used Dodge Ram 1500
518 Great Deals out of 13,131 listings starting at $1,800
Used Ford F-150
3,136 Great Deals out of 208,989 listings starting at $1,200
Used Toyota Tacoma
722 Great Deals out of 32,217 listings starting at $2,750
Used Chevrolet Colorado
326 Great Deals out of 17,982 listings starting at $1,995
Used Ford Ranger
206 Great Deals out of 6,874 listings starting at $1,595
Used Chevrolet Silverado 1500
2,608 Great Deals out of 152,726 listings starting at $1,500
Used Nissan Frontier
509 Great Deals out of 22,981 listings starting at $1,999
Used GMC Canyon
126 Great Deals out of 8,079 listings starting at $2,000
Used Chevrolet S-10
11 Great Deals out of 1,626 listings starting at $1,399
Used GMC Sierra 1500
1,005 Great Deals out of 60,427 listings starting at $1,299
Used Dodge Durango
380 Great Deals out of 23,254 listings starting at $1,500
Used Toyota Tundra
660 Great Deals out of 28,450 listings starting at $2,798
Used Dodge Ram 2500
167 Great Deals out of 5,646 listings starting at $2,995

Used Cars For Sale

2010 Dodge Dakota For Sale
8 Great Deals out of 120 listings starting at $5,499
2009 Dodge Dakota For Sale
6 Great Deals out of 90 listings starting at $7,015
2008 Dodge Dakota For Sale
16 Great Deals out of 320 listings starting at $3,895
2007 Dodge Dakota For Sale
16 Great Deals out of 378 listings starting at $3,994
2006 Dodge Dakota For Sale
25 Great Deals out of 686 listings starting at $1,500