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Discussion Starter · #1 ·
Have a 1995 wrangler. Changed o2 sensor and now have clicking under the hood when key is in the on position. will not start. can anyone help.
 

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What was going on that prompted you to change the O2 sensor?

What's making the clicking noise?

Good Luck, L.M.
 

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Discussion Starter · #4 ·
Clicking under the hood.

First I would like to thank you for your response. I'm new at this. Did a check engine light read. Was a 51 code o2 sensor. After changing the o2 sensor tried to start and now have all 4 relays clicking with no start. Have changed o2 sensor before with no problem. Had no problems prior to changing the o2 sensor besides the check engine light.
 

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First things I would do is check and clean the battery cable connections...both ends, and your ground connections at the block and firewall. Then I would charge the battery fully. You seem to be describing bad battery/starter symptoms that may be unrelated to the O2 sensor replacement
 
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