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pdooley--I wasn't holding out on you, but forgot to mention this tidbit from the better mechanic at dealer. He said that most exhaust sensor wires fail close to the sensor plug or in the plug, but that he HAS seen a couple failures at front left corner of block/head, too. Crapload of wires in...

Ok. I found it (I'm pretty sure) Fingers crossed I cut the wires about 4" from where they enter the main harness OR about 4" ahead of where they are ziptied to the exhaust tube. Mine had 2 zipties there, before wires went off to the actual sensor. I was testing continuity through the plug to...

Time. Just so little time... I think my next move is to chop wires back near entrance to wiring loom on/near head, leaving plenty to work with in the future, of course. I will then run new wires from this cut to sensor and connect using whatever cobbled $hit I can find in my garage...

Thank you!

pdooley--Thanks for the reply. Both my new and used exhaust temp sensors measured 1980 ohms at room temperature. My used sensor got boiled on stove and resistance dropped to 180ohms. This was fairly consistent with some info I found on Bosch website (though it was for a different, but similar...

2016 Spark 3-up 900 HO ACE, ~60 hours on it Got a check engine warning last weekend, which BUDS said to be Exhaust Temp Sensor related*. Spark did not go into limp mode. Continued to run just fine, aside from the loud-ass occasional beeping. Pulled upper deck off and replaced sensor with OEM...