See also:

40 MPG POWERTRAIN
Under the hood, the Hyundai Elantra is powered by an all-new 1.8-liter Nu four-cylinder engine with 148 horsepower and 131 lb-ft of torque (145 horsepower and 130 lb-ft of torque for Elantra PZEV) ...

Cooling system
Check cooling system components, such as radiator, coolant reservoir, hoses and connections for leakage and damage. Replace any damaged parts. ...

Malfunction Indicator Light
This light illuminates when there is a malfunction of an exhaust gas related component and the system is not functioning properly. This light will also illuminate when the ignition key is turned ...