No pre-cat O2 sensors for aftermarket catalytic converter? - Jeep Wrangler Forum
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Old 09-10-2012, 10:13 PM   #1
Join Date: Sep 2012
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No pre-cat O2 sensors for aftermarket catalytic converter?

Bought a Bosal catalytic converter to replace my original that was throwing code P0420 (yes I already replaced all 4 O2 sensors) and new one doesn't have pre-cat sensor ports or even a neck for me to weld in. Anyone have this problem or insight as its clearly not going to pass inspection as pre-cat O2 sensor codes will trigger. Part No. 079-3108. Inspections already up trying to get done ASAP, guessing have to order a different cat so any recommendations?
2003 Wrangler X In-Line 6 4.0L

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Old 09-10-2012, 10:41 PM   #2
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I suspect that a closer examination on your part will reveal that the upstream oxygen sensors are located a bit further "upstream."

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Old 09-11-2012, 02:16 AM   #3
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Send a message via AIM to s3nt3nc3d upstream sensors weren't anywhere near the cat
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