Malfunction Indicator Light (MIL)

This warning light illuminates in the following cases:
- When the ignition switch or Engine Start/Stop button is in the ON position.
- Stays on until the engine is started. - If there is a malfunction in the emission control system.
In this case, we recommend that you have the vehicle inspected by an authorized HYUNDAI dealer.
NOTICE: Malfunction Indicator Light (MIL)
If you drive when the malfunction indicator light (MIL) is on, you risk damaging the emission control systems, which may affect vehicle drivability and/or fuel economy.
NOTE: Gasoline Engine
If the malfunction indicator light comes on, the catalytic converter may be damaged, which may result in a loss of power. In this case, we recommend that you have the vehicle inspected as soon as possible by an authorized HYUNDAI dealer.
WARNING
Diesel Engine
If the malfunction indicator light is flashing, it indicates a malfunction in the fuel injection quantity control system, which may result in loss of power, combustion noise, and poor emission quality.
In this case, we recommend that you have the engine control system inspected by an authorized HYUNDAI dealer.
Test yourself
A quick Hyundai Tucson quiz: every answer comes with an explanation and a link to the manual page.