DTC P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control: Procedure

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0125)

Result

Display (DTC output)	Proceed to
P0125	A
P0125 and other DTCs	B

HINT:

If any other codes besides P0125 are output, perform the troubleshooting for those codes first.

B → GO TO RELEVANT DTC CHART

A: Go to next step

INSPECT THERMOSTAT
1. Check the valve opening temperature of the thermostat.
  OK
  
  Valve opening temperature is 80 to 84°C (176 to 183°F)
  
  HINT:
  
  Also check that the valve is completely closed below the opening temperature shown above.
NG → REPLACE THERMOSTAT

OK: Go to next step
CHECK COOLING SYSTEM
1. Check for defects in the cooling system that might cause the system to be too cold, such as abnormal radiator fan operation or a modified cooling system.
NG → REPAIR OR REPLACE COOLING SYSTEM

OK → REPLACE ENGINE COOLANT TEMPERATURE SENSOR