Intermittent P0141 Code - Any Ideas?

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SnuffyTheSeal

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Howdy all, another day, another Ford problem. Started to get an intermittent P0141 (Heater Circuit Bank 1 Sensor 2), and had the dealer replace the sensor. Didn't get the code for a few days and it came back. It'll only trigger the CEL on cold start, and from what I can see the wiring is fine. Anybody got any clues or advice on what's goin' on?
 

kryptto

The Best Thing About Cars... ones in my mirror.
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Year, mileage? Also fuel consumption differences? Worse mpg? More than likely bad O2, replace them if never replaced.
 

SnuffyTheSeal

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2018 with 85k miles. Fuel mileage is unaffected. Already replaced the troubled sensor. Given there was no effect on mileage I assumed it was just the heater circuit throwing a fit. Gonna double check the wiring as best I can but want to try and solve it myself before relying on a dealer.
 
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