P0125 Toyota - avensis

Question

i have toyota avensis 1.8L 2002 model and i get a code p0125 Insufficient  coolant temperature.i have replace the coolant temperature sensor but the check engine light is still on

Answer 1

P0125 Insufficient coolant temperature for closed loop operation

Coolant filled up, ? radiator cap can properly seal? Good, this code is very confusing , it not with the coolant temperature or the thermostat. It for the 02 sensor, What happens is the 02 sensor does not cycle when the engine coolant temperature reaches operating temperature and goes to open loop. but does not because the 02 sensor does not properly function. replace the 02 or the A/F sensor, and your good to go