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Discussion Starter · #1 ·
Hey guys,

This ones been throwing me off. 95 YJ warms up and then check engine for an o2 sensor. Swapped the sensor and still popped on. It had bogging issues when warm as well but did a tune up (Cap/ rotor/ Champion copper plugs/ wires). Ran some injector cleaner as well. Cleaned up the bogging and some rough-ness but the check engine still comes on and only when its warm. Swapped the o2 again thinking might of gotten a bad apple but issue persists.

Owned a few of these YJs but this one runs at about 160* which I thought was odd since all mine ran 195-210*. Could this possibly affect the engine not getting hot enough with fluctuations of CO & Nox not being accurate and throwing off the o2 in return sending a check engine?
 
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