Your vehicle may be equipped with the ISG system, which reduces fuel consumption by automatically shutting down the engine, when the vehicle is at a standstill. (For example : red light, stop sign and traffic jam)
The engine starts automatically as soon as the starting conditions are met.
The ISG system is ON whenever the engine is running.
✽ NOTICE
When the engine automatically starts by the ISG system, some warning lights (ABS, ESC, ESC OFF, EPS or Parking brake warning light) may turn on for a few seconds.
This happens because of low battery voltage. It does not mean the system has malfunctioned.
Kia Cee'd JD Service Manual: ETC (Electronic Throttle Control) System Specifications
Specification
[Throttle Position Sensor (TPS)]
Throttle angle(°)
Output Voltage (V) [Vref=5V]
TPS1
TPS2
0
0.5
4.5
10
0.96
4.05
...
Kia Cee'd JD Service Manual: Master Cylinder Repair procedures
Removal [LHD]
1.
Turm ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the battery.
(Refer to Engine Electrical system-"Battery")
3.
Remove the ECM.
...