DTC P0125: ECT Excessive Time To Enter Closed Loop Fuel Control: Description

An Engine Coolant Temperature (ECT) sensor monitors the temperature of the coolant. This input is used by the Powertrain Control Module (PCM) for engine control and as an enabling criteria for some diagnostics. The airflow coming into the engine is accumulated and used to determine if the engine has been driven within conditions that would allow the engine coolant to heat up normally to the thermostat regulating temperature. If the coolant temperature does not increase normally or does not reach regulating temperature of the thermostat, diagnostics that use engine coolant temperature as enabling criteria, may not run when expected. This DTC will only run once per ignition cycle within the enabling conditions. This DTC will set when there has been excessive time to reach a minimum coolant temperature required for closed loop fuel control.