Hello, 96 G.T. Had a high idle , and a code p0125 when I stepped on accelerator . Have new working thermostat , verified that. Coolant was right at cold mark. Bought a etc sensor for 25 bucks , and the car just evened out. Cold start high rpms then dropped down to 1000 , then down to 650 , automatic trans. Runs great. Can't even tell car is running at stop light . Smooth . Quiet. Very happy.

 

Good example showing the need to view and interpret codes! Wish mine was that easy, it's been unsolved for over a year.......