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

11,385

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

  • Three mechanics couldn't figure out what's wrong 17 answers

    My 2002 Dodge Dakota runs fine until 150 degrees then it starts to chug backfire wont take gas until it gets up to 200 degrees and then it levels out and runs just fine..... the original problem w...

    2002 Dodge Dakota 2 Dr SXT Extended Cab SB

    -

    Maintenance & Repair

  • 05 Durango 4.7 crankshaft sensor

    Hello I bought a 2005 dodge Dakota 4.7... Hello I bought a 2005 dodge Dakota 4.7 magnum. Salvage yard motor was put in it, and would not run after replacement. Engine is showing crankshaft position...

    2005 Dodge Dakota 4 Dr SLT Quad Cab SB

    -

    Maintenance & Repair

  • 1997 Dakota w/ 318 runs rough when cold. once it warms up it runs great. what would cause this? 7 answers

    Replaced map sensor, iac valve, tps sensor, new distributor, cap, rotor, wires and plugs. did a compression check 125 psi each cylander. Still runs rough when cold. After it warms up runs great. any ...

    1997 Dodge Dakota 2 Dr STD Standard Cab SB

    -

    Maintenance & Repair

  • 5.2 wont start 3 answers

    its throwing a crank sensor code and a tps code ive replaced both and changed the computer im out of ideas. this all started after i put a new tranny in it

    Dodge Dakota

    -

    Maintenance & Repair

  • Horn sensor not working? Can I locate one without buying a new airbag? 5 answers

    2001 Dodge Dakota 4 Dr SLT Crew Cab SB

    -

    Shopping & Pricing

Dakota

Looking for a Used Dakota in your area?

CarGurus has 4,297 nationwide Dakota listings starting at $1,495.

ZIP:

Search Dodge Dakota Questions

Dodge Dakota Experts

#1 Samantha Brown
Samantha Brown
Reputation 1,010
#2 banana
banana
Reputation 1,000
#3 Snidely
Snidely
Reputation 850
View All

Related Models For Sale

Used Dodge Ram 1500
528 Great Deals out of 12,814 listings starting at $1,995
Used Ford F-150
2,691 Great Deals out of 211,555 listings starting at $1,000
Used Toyota Tacoma
612 Great Deals out of 35,096 listings starting at $2,155
Used Chevrolet Colorado
263 Great Deals out of 19,394 listings starting at $1,995
Used Chevrolet Silverado 1500
2,283 Great Deals out of 155,210 listings starting at $1,395
Used Ford Ranger
203 Great Deals out of 6,718 listings starting at $1,450
Used Nissan Frontier
433 Great Deals out of 24,036 listings starting at $1,900
Used Chevrolet S-10
9 Great Deals out of 1,654 listings starting at $2,450
Used GMC Sierra 1500
938 Great Deals out of 62,237 listings starting at $1,395
Used GMC Canyon
100 Great Deals out of 7,695 listings starting at $2,500
Used Dodge Durango
299 Great Deals out of 24,118 listings starting at $1,500
Used Toyota Tundra
587 Great Deals out of 30,722 listings starting at $2,637
Used Dodge Ram 2500
152 Great Deals out of 5,502 listings starting at $2,500

Used Cars For Sale

2010 Dodge Dakota For Sale
7 Great Deals out of 118 listings starting at $5,499
2009 Dodge Dakota For Sale
6 Great Deals out of 81 listings starting at $7,015
2008 Dodge Dakota For Sale
16 Great Deals out of 315 listings starting at $4,595
2007 Dodge Dakota For Sale
16 Great Deals out of 373 listings starting at $3,400
2006 Dodge Dakota For Sale
28 Great Deals out of 671 listings starting at $1,500