Hyundai Sonata LF: Engine Control / Fuel System

Hyundai Sonata LF 2014-2019 Service Manual / Engine Control / Fuel System

Exhaust Emission Control System

Description and Operation Description Exhaust emissions (CO, HC, NOx) are controlled by a combination of engine modifications and the addition of special control components...

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Hyundai Sonata LF 2014-2019 Service Manual: Fuel Pressure Control Valve Repair procedures


Inspection 1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. Disconnect the fuel pressure regulator valve connector. 3. Measure resistance between the fuel pressure regulator valve terminals 1 and 2. 4. Check that the resistance is within the specification...

Hyundai Sonata LF 2014-2019 Service Manual: CVVT Oil Control Valve (OCV) Description and Operation


Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine speed and load. By controlling CVVT, the valve over-lap or under-lap occurs, which makes better fuel economy and reduces exhaust gases (NOx, HC) and improves engine performance through reduction of pumping loss, internal EGR effect, improvement of combustion stability, improvement of volumetric efficiency, and increase of expansion work...

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