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Old 08-06-2013, 04:34 PM   #1
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1999 Wrangler SE 2.5L engine problem

My 2.5L engine (175,000 miles) had the o2 sensor just below the manifold went (check engine light came on and I had the code checked and confirmed it was the o2 sensor) bad the other weekend. I replaced, and after a week, the new one went bad. When I removed it, it had a lot of black soot on it. I checked the spark plugs and they had some soot on them too. Any idea what the cause is and how to fix it?

Thanks!!!

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Old 08-06-2013, 04:37 PM   #2
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What brand sensor did you install?

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Old 08-06-2013, 05:59 PM   #3
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Quote:
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What brand sensor did you install?
Bosch
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Old 08-06-2013, 06:30 PM   #4
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Bosch
Junk for TJ's. Go and get a NTK/NGK brand and stick it in. I did that for my past 97 2.5 and it worked great.
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Old 08-06-2013, 07:45 PM   #5
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Bosch
Therein lies your problem. While Bosch makes a superior product IMO, our Jeeps don't like them. As stated above get yourself a NTK brand sensor and your problems will go away.
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