When ignition switch is turned to ON, the indicator light illuminates, then goes off if the ESC system is operating normally.
The ESC indicator light blinks whenever ESC is operating or illuminates when ESC fails to operate.
ESC OFF indicator light comes on when the ESC is turned off with the button.
CAUTION
Driving with varying tire or wheel sizes may cause the ESC system to malfunction. When replacing tires, make sure they are the same size as your original tires.
WARNING
The Electronic Stability Control system is only a driving aid; use precautions for safe driving by slowing down on curved, snowy, or icy roads. Drive slowly and don’t attempt to accelerate whenever the ESC indicator light is blinking, or when the road surface is slippery.
Kia Niro 2017 (DE HEV) Service Manual: Filler-Neck Assembly Repair procedures
Removal
1.
Open the fuel filler door.
2.
Switch "OFF" the ignition and disconnect the negative (-) terminal of
the auxiliary 12V battery.
3.
Remove the filler-neck assembly mounting bolt (A).
...
Kia Niro 2017 (DE HEV) Service Manual: General safety information and caution
Safety Precaution
Precautions to take before servicing
high voltage system
Hybrid vehicles have high voltage batteries. Incorrect handling
of high voltage sy ...