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MaDgamEr
Dodge Dakota
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3/30/2004
16:26:43

Subject: Code P0141, need help.
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Hey guys,

Well, I replaced my downflow o2 sensor AGAIN and after driving a bit over the past day I plugged in my code reader to check for any "pending" codes and sure enough, P0141 (downflow 02 sensor heater circuit malfunction) poped up, but no MIL light yet.

For those that don't know my recent woes... About 3 weeks ago I tried to go to Dodge and get my (very obviously dying) Cat converter replaced before my emissions warranty expires in about 5,000 km. Around the same time, I got code P0137 (downflow o2 sensor shorted to ground) so I replaced it with the recomended MOPAR ($$$) part. Less than 24 hrs later the MIL was back on, I got pissed and bought my own engine code reader, and picked up 2 codes: P0138 (Downflow o2 sensor above normal operating voltage) and P0141 (Downflow o2 sensor heater circuit malfunction). Ok, now I'm pissed... dealership finaly exchanged the o2 sensor since it MAY have been bad. So I replaced it again, cleared the codes drove like normal for the past day, and now got P0141 AGAIN, but pending, since no MIL light yet, but I know its only a matter of time before it comes on.

Anyone have ANY clue as to why this is happening? Or where I should begin since I highly doubt that its another "bad" 02 sensor. Feeling pretty stuck on this one... Thanks in advance guys.



ticats
Dodge Dakota
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3/31/2004
07:51:39

RE: Code P0141, need help.
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Hey, MaDgamEr ... you've moved :-)

I agree that it is highly unlikely that you've got another bad O2 sensor. Quite often a DTC is caused by open circuit used to power the component, either a fuse is blown or has been erroneously removed. The rear O2 sensor is protected by 2 fuses. Usually it's the lower amperage fuse that is either missing or blown. The lower amperage fuse is positioned electrically in the Power Distribution Center or in the instrument panel Junction Block. See your FSM for the exact location. Check to see if fuse is there or blown. An O2 sensor heater, when damaged or overheated, may short the circuit and cause the fuse to blow. The higher amperage fuse is in the PDC but is not normally the cause of the DTC. Sure HTH!



MaDgamEr
Dodge Dakota
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4/16/2004
20:24:10

RE: Code P0141, need help.
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Thought I had it licked, but I guess not!

Worked fine for a couple weeks, on my way home from work today, MIL came on... pulled out my code reader... same old story! P0138 as the MIL cause and P0141 code pending. I'm about ready to give up on this problem! Could it be the cat converter that's causing this??

HELP!!



ticats
Dodge Dakota
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4/17/2004
08:03:12

RE: Code P0141, need help.
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There are two ways a converter can fail. First, its plugged up and won't let exhaust through it. This type of failure is far more common on "modern" honeycomb style conveters. This will cause driveability problems which you haven't mentioned. Rap the inlet and outlet pipes at the cat to hear if any of the substrate has broken.

The other failure mode is that the catalyst isn't doing what its supposed to - namely causing the CO and HC to convert to CO2 and H2O. To test this, you need to have access to a gas analyzer. Make sure that the engine and exhaust are run up to operating temp. Shut off the engine,remove the coil wire so it can't start, insert the exhaust gas analyzer in the exhaust and crank the engine with the throttle wide open. If the converter is working, the hot catalyst will act on the raw fuel coming through the converter. If the cat is weak, the raw HC's will make it through to the analyzer and the readings will go sky high. There may be other ways to check it but they aren't as effective. Is there any odour of gasoline or sulphur from the exhaust tips?

The only other thing that I can think of besides a bad or missing fuse is a fault in the grounding of the sensor. Very difficult to detect. It may be that the ground wire insulation is worn somewhere and periodically rubs against something or it may be that the sensor itself is grounding against the exhaust pipe.



scjosh
Dodge Dakota
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1/26/2013
21:44:41

RE: Code P0141, need help.
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Im having the same issue fuses
are fine I've taken the harness out
and it looks fine replaced the o2
sensors with dealership o 2original
and still nothing has changed did u
ever figure out what was going on
please reply



John Karpuk
Dodge Dakota
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7/24/2014
17:47:38

RE: Code P0141, need help.
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need help on the APO 141 can't get it inspected without that
being fixed engine light will not stay outoxygen sensor has
been replaced 3 times and fuses have been checked all good
help I can't keep going through this through every
inspection.john



John Karpuk
Dodge Dakota
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7/24/2014
17:56:16

RE: Code P0141, need help.
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need help on the APO 141 can't get it inspected without that
being fixed engine light will not stay outoxygen sensor has
been replaced 3 times and fuses have been checked all good
help I can't keep going through this through every
inspection.john



daddio
Dodge Dakota
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7/24/2014
19:50:38

RE: Code P0141, need help.
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Do you have a 4.7? Are you leaking power steering fluid? If so,
there is your problem.



Corey Hudnell
Dodge Dakota
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12/06/2019
02:24:50

RE: Code P0141, need help.
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Hello! I have a 2004 Dodge Dakota 4x4 featuring
the 4.7 Ltr, V8 engine w/ air conditioner.
NOTE: The AC compressor is non-functioning. I
have several inter-connected problems.

You may already know, the Dakotas & Durangos
have an ECM code reader built into the digital
odometer indicator. In 2018, the built-in
reader gave me the following codes: P0135,
P0141, and P0420. At the repair shop, the codes
were confirmed by the mechanic's own code
reader. To correct the problem, both the
upstream and downstream O2 sensors were
replaced. Also, the expensive catalytic
converter was replaced. For a while, the
vehicle ran well, then 2 codes returned: P0135
& P0141.

In 2019, I began detecting a STRONG scent of
exhaust fumes coming out of the vents. The
vehicle started consuming fuel like I owned an
oil company, and I experience frequent engine
stalls at "stop" signs & traffic lights. Once
again, the mechanic replaced the upstream &
downstream O2 sensors. No joy! The 2 codes
remained.

I went to a different mechanic. He determined
the expensive ECM needed to be replaced &
reprogrammed. I trusted his opinion and paid
for the replacement. Finally, the error codes
were gone, but each of the problems remain.

After a few days of driving, the error code
P0141 has returned. I cannot believe the engine
stalls, increased fuel consumption, & exhaust
fumes in the vent are all the fault of a
defective O2 sensor.

Any theories?



   P 1


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