Hyundai Sonata: Active ECO operation - Active ECO system - Driving your vehicle - Hyundai Sonata YF 2011-2019 Owner's ManualHyundai Sonata: Active ECO operation

Active ECO helps improve fuel efficiency by controlling the engine and transaxle.

Active ECO helps improve fuel efficiency by controlling the engine and transaxle. But fuel-efficiency can be changed by the driver's driving habits and road conditions.

  • When the Active ECO button is pressed the ECO indicator (green) will illuminate to show that the Active ECO is operating.
  • When the Active ECO is activated, it does not turn off even though the engine is restarted again. To turn off the system, press the active ECO button again.
  • If Active ECO is turned off, it will return to the normal mode.
    Limitation of Active ECO operation
    If the following conditions occur while Active ECO is operating, the system operation is limited even though there is no change in the ECO indicator. When the coolant temperature is low: The sys ...

    See also:

    Smooth cornering
    Avoid braking or gear changing in corners, especially when roads are wet. Ideally, corners should always be taken under gentle acceleration. If you follow these suggestions, tire wear will be ...

    Electrical System
    1. Be sure to disconnect the battery cable from the negative (-) terminal of the battery. 2. Never pull on the wires when disconnecting c ...

    Troubleshooting
    Troubleshooting Symption Suspect area Remedy Engine misfire with abnormal internal lower engine noises. Worn crankshaft bearings Lo ...