2018 Hyundai Elantra Check Engine Light and Car Shaking
If your 2018 Hyundai Elantra is experiencing a check engine light and car shaking, it could be caused by a number of issues. Here are some of the most common causes:
1. Spark Plugs
Spark plugs are responsible for igniting the air-fuel mixture in your engine. If they are worn out or damaged, they can cause your engine to misfire, which can lead to a check engine light and car shaking. Symptoms of bad spark plugs include:
- Rough idling
- Hesitation or stumbling when accelerating
- Decreased fuel economy
- Check engine light
2. Ignition Coils
Ignition coils are responsible for providing the spark plugs with the electricity they need to ignite the air-fuel mixture. If an ignition coil is failing, it can cause your engine to misfire, which can lead to a check engine light and car shaking. Symptoms of a bad ignition coil include:
- Rough idling
- Hesitation or stumbling when accelerating
- Decreased fuel economy
- Check engine light
3. Mass Airflow Sensor
The mass airflow sensor (MAF) is responsible for measuring the amount of air entering the engine. If the MAF is dirty or damaged, it can send incorrect data to the engine computer, which can cause the engine to run rich or lean. This can lead to a check engine light and car shaking. Symptoms of a bad MAF include:
- Rough idling
- Hesitation or stumbling when accelerating
- Decreased fuel economy
- Check engine light
4. Oxygen Sensors
Oxygen sensors are responsible for measuring the amount of oxygen in the exhaust gas. If an oxygen sensor is damaged or failing, it can cause the engine to run rich or lean. This can lead to a check engine light and car shaking. Symptoms of a bad oxygen sensor include:
- Rough idling
- Hesitation or stumbling when accelerating
- Decreased fuel economy
- Check engine light
5. Catalytic Converter
The catalytic converter is responsible for reducing the emissions from the exhaust gas. If the catalytic converter is damaged or clogged, it can cause the engine to run poorly and shake. Symptoms of a bad catalytic converter include:
- Rough idling
- Hesitation or stumbling when accelerating
- Decreased fuel economy
- Check engine light
- Rotten egg smell from the exhaust
6. Fuel Injector
Fuel injectors are responsible for spraying fuel into the engine’s cylinders. If a fuel injector is clogged or damaged, it can cause the engine to run rich or lean. This can lead to a check engine light and car shaking. Symptoms of a bad fuel injector include:
- Rough idling
- Hesitation or stumbling when accelerating
- Decreased fuel economy
- Check engine light
7. Transmission Problems
In some cases, a check engine light and car shaking can be caused by transmission problems. Symptoms of transmission problems include:
- Slipping gears
- Jerking or shuddering when shifting gears
- Difficulty shifting gears
- Check engine light
8. Engine Mounts
Engine mounts are responsible for holding the engine in place and reducing vibrations. If an engine mount is damaged or worn out, it can cause the engine to shake. Symptoms of bad engine mounts include:
- Excessive engine vibration
- Clunking or banging noises when shifting gears
- Check engine light
What to Do If Your 2018 Hyundai Elantra Check Engine Light Is On and the Car Is Shaking
If your 2018 Hyundai Elantra check engine light is on and the car is shaking, it is important to have the issue diagnosed by a qualified mechanic. The mechanic will be able to determine the cause of the issue and recommend the best course of action.
Here are some things you can do to help the mechanic diagnose the problem:
- Write down the symptoms you are experiencing.
- Note when the check engine light came on.
- Note any other recent repairs or modifications you have made to the car.
The more information you can provide to the mechanic, the easier it will be for them to diagnose the problem and recommend the best course of action.
