Information
Make sure that all warning lights are OFF after starting the engine. If any light is still ON, this indicates a situation that needs attention.
Supplemental Restraint System Warning Light

This warning light illuminates:
Seat Belt Warning Light

This warning light informs the driver that the seat belt is not fastened.
For more details, refer to the "Seat Belts" in chapter 2.

This warning light illuminates:
If the brake fluid level in the reservoir is low:
1. Drive carefully to the nearest safe location and stop your vehicle.
2. With the engine stopped, check the brake fluid level immediately and add fluid as required (For more details, refer to "Brake Fluid" in chapter 7). After adding brake fluid, check all brake components for fluid leaks. If a brake fluid leak is found, or if the warning light remains on, or if the brakes do not operate properly, do not drive the vehicle. Have the vehicle inspected by an authorized HYUNDAI dealer.
Dual-diagonal braking system
Your vehicle is equipped with dualdiagonal braking systems. This means you still have braking on two wheels even if one of the dual systems should fail.
With only one of the dual systems working, more than normal pedal travel and greater pedal pressure is required to stop the vehicle.
Also, the vehicle will not stop in as short a distance with only a portion of the brake system working.
If the brakes fail while you are driving, shift to a lower gear for additional engine braking and stop the vehicle as soon as it is safe to do so.
WARNING
Parking Brake & Brake Fluid Warning Light
Driving the vehicle with a warning light ON is dangerous. If the Parking Brake & Brake Fluid Warning Light illuminates with the parking brake released, it indicates that the brake fluid level is low.
In this case, have your vehicle inspected by an authorized HYUNDAI dealer.
Transmission Shift IndicatorHyundai Elantra AD (2016-2020) Service Manual: Ambient Temperature Sensor Repair procedures
Inspection
1.
Check the resistance of the ambient temperature sensor
between terminals 1 and 2 whether it changes by changing the ambient
temperature.
1. Ambient Sensor (+)2. Sensor ground
Specification
Ambient temperature [°C (°F)] Resistance between terminal 1 and 2 (k?)-30 (-22)4 ...
Hyundai Elantra AD (2016-2020) Service Manual: Purge Control Solenoid Valve (PCSV) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the PCSV connector.
3.
Measure resistance between the PCSV terminals 1 and 2.
4.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch O ...