Trouble code 141 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-04-2003, 03:54 PM
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Trouble code 141

It came on last night. Used the reader unit and it said "P0 141 02 Sensor. Heater Circuit Malfunction. Bank 1 Sensor 2" - Cleared the error code and it came back on again today. I guess my O2 sensor went bad?
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post #2 of (permalink) Old 09-04-2003, 04:57 PM
 
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Re: Trouble code 141

so the engine indicator light came on in the dash?

I was thinking O2 sensor as well, but I'm not sure with what the readout is saying. Question, in looking under your truck, before the cats, does your truck have 1 O2 sensor or 2? Mine has only 1, but I thought I remembered someone saying '96 models have 2. If so, then I would say that's your problem.
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post #3 of (permalink) Old 09-04-2003, 06:16 PM
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Re: Trouble code 141

Juice: Yes, the check engine light was on. I used the ODB-II reader to read the error code.

Crawling uner the truck I saw 3 O2 sensors. Two are on the manifold outlets of each side and the 3rd one are located between the 1st and 2nd cat. I suspect it's the 3rd O2 sensors that is malfunctioned.
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post #4 of (permalink) Old 09-05-2003, 01:02 AM
 
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Re: Trouble code 141

Dang, 3 O2's...now why did they go and do that? Guess you'll be playing Russian Rhoulette with them. I would do as you, guess, and hope you're right, less you want to go ahead and buy all 3!!! Trying to remember now...mine went out years ago, and there is only 1. Think Bosch sells them for like $35???

You'll likely have to soak it first in "the Penetrant" in order to remove without damage.

Someone correct me if I be wrong, but I think you can install these using the permatex anti-seize...since you have 3, making these easier to remove sure would be nice.
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post #5 of (permalink) Old 09-08-2003, 01:18 AM
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Re: Trouble code 141

Haynes tells how to test the HEGOs with a multimeter.

Juice
OBD-II ('96-up) uses 3-6 HEGOs to monitor the cats' efficiencies.
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