Chevrolet Repair: 1994 caprice 4.3 liter v-8, computer light, coolant

Question
I replaced coolant sensor on front of engine (too much fuel when trying to start-idleing dowm the road at 45 mph).car runs great but check eng.light still on.unhooked battery to reset computer,light still on .had it checked and showed coolant sensor.was told car has two sensors, 1 on engine, other on computer.like to get location of cpu and sensor and tips,(like to fix myself)Thank You

Answer
I am assuming you replaced the one on the water pump. If you did that is the one you needed to change.  The other one just works the gauge.  The computer does not have a gauge on it. Once again I must say sometimes youare better off getting diagnosis at a dealer and then try and fix what they suggest.