DTC Detection Logic

WARNING: This page is about a different car, the 2011 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If DTC P0125 is displayed with DTC P0117 or P0118, first perform the trouble diagnosis for DTC P0117, P0118. Refer to "DTC LOGIC ".
If DTC P0125 is displayed with DTC P0116, first perform the trouble diagnosis for DTC P0116. Refer to "TYPE A: DTC LOGIC ".

DTC DETECTION CONDITION CHART

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
P0125	Insufficient engine coolant temperature for closed loop fuel control	Voltage sent to ECM from the sensor is not practical, even when some time has passed after starting the engine. Engine coolant temperature is insufficient for closed loop fuel control.	Harness or connectors (High resistance in the circuit) Engine coolant temperature sensor Thermostat