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Discussion Starter · #1 ·
2 days ago I thought I needed to replace the muffler but it was a bad cat converter.We replaced with a straight pipe with 02 sensor installed,drove yesterday no problem today check engine light came on,at lunch I checked oil and water all good.any way to bypass 02 sensor.this is on a 1997 wrangler TJ with a new motor.any input appreciated.
 

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I would start with checking the code associated with the CEL - it is possible not related to the work you recently performed...
 

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Discussion Starter · #4 ·
The reason I checked oil/water was to make sure it was ok that area.this is recent install with only 125 miles on motor,but I understand could be unrelated to work just performed but thanks for reminder.thanks again for response.
 
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