There are two temp sensors, one just below the T-stat in one of the radiator hoses near the water pump, and the other mounted in the rear crossover. I don’t know which would be causing the trouble. I think the rear registers the hot side of the coolant system leaving the block, and the front registers the cold side leaving the radiator. So, I’d be inclined to think it’s the rear sensor used for fuel control, but not entirely sure - could use both. I think the car does do a logic check of some kind by comparing the two values to see if the hot/cold differential is within some kind of range. You might try to first see the readings on both when the engine is cold and see if one looks off - I think they are just called temp sensor 1 and 2 in the gap tool.