2022 Hyundai Elantra Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2022 Hyundai Elantra and How to Resolve Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
21% chance it's the
Spark Plugs
0%
15% chance it's the
Ignition Coil
0%
64% chance it's
Something else
The most common reasons a 2022 Hyundai Elantra has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
  • Spark Plugs: Worn or fouled spark plugs can lead to misfires, poor fuel economy, and difficulty starting the engine.
  • Ignition Coil: A faulty ignition coil can cause misfires, rough idling, and difficulty starting the engine due to inadequate spark delivery to the spark plugs.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2022 Hyundai Elantra has rough idle?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Brake caliper failure occurs in two different ways, and they create different symptoms.

The caliper can become stuck, in which case it won't release the brake pads. The seized caliper will cause the vehicle to brake constantly on one side, forcing the car to move toward that side. This pulling will be accompanied by a strong odor from one wheel.

Another way calipers fail is by leaking. If the caliper leaks, the brake pedal will feel too easy to push, and will sink all the way to the floor when held. Braking will become less effective the longer this goes on. There may also be brake fluid leaking onto the wheel.

Here are a few common symptoms of worn-out brake pads:

  1. Low brake pad warning light is on: Not all vehicles are equipped with this system, but if yours is, this dashboard indicator light will likely be the first signal it’s time to replace your brake pads.
  2. Brakes start to squeal regularly: This is often one of the first signs of worn brake pads and is caused by a metallic piece built into brake pads for this exact purpose. This part contacts the brake rotor to make a squealing or whining noise when the pads are low.
  3. Brakes make loud grinding noise: If not addressed early enough, your brake pads may get so worn that the metal backing plate of the pad grinds against the metal rotor.
  4. Brake pads look thin: You may be able to visually check your brake pad thickness to determine if they need replacement.

Brake rotors are mainly maintenance free, but when they have been subjected to abnormally hard use, the heat they absorb can cause the metal to turn blue, and cracking to occur. When this occurs, customers often specify they have lost braking power, or the vehicle's brakes are making noise. There may be no symptoms at all related to changing the brake rotors, since it is recommended to change brake rotors on most modern vehicles when performing a standard brake service.

Most often, a brake system inspection will just be a routine portion of manufacturer specified maintenance, and will be performed at mileage intervals. In those cases, there will likely be no symptoms. However, when a brake system makes a funny noise, causes vibration, is hard to use, will not slow the vehicle, prevents the vehicle from driving, makes the vehicle pull to one side, or leaks brake fluid, the vehicle will need a visit dedicated to the inspection of the brake system.

What are the steps to diagnose a rough idle in a 2022 Hyundai Elantra?

To effectively diagnose a rough idle in your 2022 Hyundai Elantra, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by using an OBD-II scanner to check for any error codes, as these can quickly point you to potential issues within the vehicle's computer system. Next, inspect the air filter; a clogged filter can significantly restrict airflow, leading to performance problems. Following this, examine the spark plugs for wear or fouling, as these components are crucial for proper engine combustion. After addressing these initial checks, turn your attention to the fuel system, looking for clogs in the fuel filter or issues with the fuel injectors that could affect engine performance. Additionally, inspect the vacuum hoses for any leaks or cracks, as these can disrupt the air-fuel mixture and contribute to a rough idle. Finally, don’t overlook the throttle body; a buildup of dirt or malfunction can also lead to idle issues. By following this structured diagnostic approach, you can efficiently identify and resolve the cause of a rough idle in your Elantra, ensuring a smoother driving experience.

What are the common problems that could cause a rough idle in a 2022 Hyundai Elantra?

When dealing with a rough idle in your 2022 Hyundai Elantra, it's essential to consider several common problems that could be affecting your vehicle's performance. One of the first areas to check is the air filter; a dirty or clogged air filter can significantly restrict airflow to the engine, leading to an uneven idle. Additionally, inspect the spark plugs, as worn or faulty plugs can cause misfiring, which is another common culprit behind rough idling. Another critical aspect to examine is the vacuum system for any leaks, as these can disrupt the air-fuel mixture and result in instability during idle. Fuel system issues, such as a clogged fuel filter or a malfunctioning fuel pump, can also impact engine performance, contributing to a rough idle. Furthermore, a faulty oxygen sensor can alter the air-fuel ratio, exacerbating the problem. Lastly, don’t overlook the ignition system; problems with components like the ignition coil or distributor can lead to similar symptoms. By systematically checking these areas, you can effectively diagnose and address the rough idle issue in your Elantra, making it a rewarding DIY project.

How urgent is it to address the rough idle in a 2022 Hyundai Elantra?

When dealing with a rough idle in your 2022 Hyundai Elantra, it's crucial to recognize the urgency of the situation. A rough idle can indicate underlying engine issues that, if left unchecked, may escalate into more severe problems, potentially leading to costly repairs. For DIY enthusiasts, understanding the implications of neglecting this symptom is essential. Not only can a rough idle decrease your vehicle's fuel efficiency, but it can also cause undue wear on engine components, which may compromise the vehicle's overall performance and safety. By addressing the issue promptly, you can prevent further complications and ensure that your Elantra runs smoothly. Regular maintenance checks and timely repairs are key to maintaining your vehicle's health, allowing you to enjoy a reliable driving experience while also saving money in the long run. Therefore, while it may not seem like an immediate emergency, taking action sooner rather than later is advisable to safeguard your investment and enhance your driving safety.

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2022 Hyundai Elantra Rough Idle: Causes & Repair Costs