What is a p0128 on Kia Sportage?

Answer 1

Description

An Engine Coolant Temperature Sensor (ECTS) monitors the temperature of the coolant. This input is used by the ECM for engine control and as an

enabling criteria for same diagnostics. The air flow 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 reach

regulating temperature of the thermostat, diagnostics that use engine coolant temperature as enabling criteria, may not run when expected. This DTC

will set when there has been excessive time to reach a minimum coolant temperature required for closed loop fuel control.

The ECM sets DTC P0128 If ECM detects minimum decrease of coolant temp is higher than threshold value after opening of thermostat.

DTC Detecting Condition

Enable Conditions :

Integrated air mass : > 4.4lb

coolent temperature at start : -5° C(23° F)<< 50° C(122° F)

engine speed : > 1200rpm

vehicle speed : 5.5mile/h

ambient air temperature : -5° C(23° F)<<30° C(86° F)

Min. decrease of coolent temp.after opening of thermostat: > 2.25° C(36.05° F)

Set: Once per driving cycle

Reset: 2 driving cycles