Inspect your spark plugs as described in section 8 and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or CAUTION damaged in any way.
Kia Niro (DE HEV) Owners Manual: Economical operation
Your vehicle's fuel economy depends mainly on your style of driving, where you
drive and when you drive.
Each of these factors affects how many kilometers (miles) you can get from a
liter (gallon) of fuel.To operate your vehicle as economically as possible, use
the following driving sugge ...
Kia Niro 2017 (DE HEV) Service Manual: Audio Unit Components and components location
Components
[RADIO/CD/MP3]
Connector Pin Information
No.
Connector A
Connector B
1
Rear left speaker (+)
-
2
Rear left speaker (-)
MIC (+)
...