Troubleshooting
DTC P0125 Insufficient Coolant Temperature for Closed Loop Fuel ControlCIRCUIT DESCRIPTION
DTC Detecting Condition:
A thermistor built into the engine coolant temperature sensor changes the resistance value according to the engine coolant temperature.
The structure of the sensor and connection to the ECM is the same as in the DTC P0110.
If the ECM detects the DTC P0115, DTC P0117 or DTC P0118 it operates the fail-safe functions in which the engine coolant temperature is assumed to be 80 °C (176 °F).
HINT: After confirming DTC P0115, P0117 or P0118 use the OBD II scan tool or hand-held tester to confirm the engine coolant temperature from the CURRENT DATA.
Step 1 - 2:
INSPECTION PROCEDURE
HINT:
- If DTCs P0115 or P0117 or P0118 and P0116 or P0125 are output simultaneously, engine coolant temperature sensor circuit may be open. Perform a troubleshooting of DTC P0115 first.
- Read freeze frame data using hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.