2021 Hyundai Sonata Engine Makes A Ticking Noise

Common Causes of Ticking Noises in Your 2021 Hyundai Sonata Engine and How to Address Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
12% chance it's the
Exhaust Leak
0%
88% chance it's
Something else
The most common reasons a 2021 Hyundai Sonata engine makes a ticking noise are low oil level or pressure, an issue with the ignition system, or an exhaust leak.
  • Exhaust Leak: A damaged exhaust manifold or a loose connection in the exhaust system can cause an exhaust leak, resulting in increased noise and potential loss of engine power.
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 2021 Hyundai Sonata engine makes a ticking noise?

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.

If the drive belt tensioner fails, there will be a very audible chirping, grinding, or rattling noise from the front of the engine. This is because the tensioner pulley bearing is no longer smooth, and rotating causes metal to grind at high speeds. If it is not changed immediately, there is a chance it will become dislodged, or allow the drive belt to lose tension, or break. If the belt falls off, the accessory that it drives will no longer function. Also, if the tensioner spring fails, allowing slack in the belt, it may make an extremely loud squeaking or screeching noise combined with a rattle as the tensioner bounces back and forth under load. The squealing noise is the belt slipping on the crankshaft pulley, and will require belt replacement once the belt tensioner is replaced.

An engine leaking oil does not always make a puddle on the ground. A burning smell may be noticed from the front of the vehicle after driving. This is because engine oil leaks may fall onto hot engine components, especially the exhaust manifold, and burn off before making it to the ground. This poses a risk to the engine because the leak going unnoticed may deplete the engine oil reserve, and lead to an oil starvation issue. Some engine oil leaks only occur while the engine is running, so the leak may be larger than the small spot on the ground makes it seem.

Noises can be accompanied by many annoying or worrisome sensations. Consider the noise of grinding brakes, the noise sounds much like the brake pedal and steering wheel feel. This is important, as random noises can be difficult to replicate without knowing when the sound occurs, what must be done to make the sound, and what sound it is. Any professional technician can replicate and diagnose most noises, but to ensure the vehicle is more quickly diagnosed, make sure you tell your technician these three pieces of information.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the potential causes of a ticking noise in the engine of a 2021 Hyundai Sonata, and how should they be diagnosed?

When faced with a ticking noise in your 2021 Hyundai Sonata, a systematic diagnostic approach is essential for identifying the root cause. Start by performing a visual inspection of the engine components, looking for any signs of wear or damage, particularly around the valve lifters and timing chain tensioner. Next, check the engine oil level and quality; low or dirty oil can significantly contribute to engine noise, so ensuring proper lubrication is a critical first step. Listening carefully to the engine can also provide valuable insights; using a stethoscope can help you pinpoint the exact location of the ticking sound, which may indicate whether the issue lies with the valve lifters, timing chain tensioner, or even an exhaust leak. If these initial checks do not reveal the problem, consider monitoring the engine's performance for signs of spark knock, which can also manifest as a ticking noise. Should the source of the noise remain elusive, consulting a qualified mechanic or a Hyundai service center is advisable to ensure a thorough and accurate diagnosis. By following this structured approach, you can effectively narrow down the potential causes of the ticking noise and take appropriate action to resolve the issue.

What could be causing the ticking noise in the engine of a 2021 Hyundai Sonata?

When diagnosing a ticking noise in the engine of a 2021 Hyundai Sonata, it's crucial to consider several common problems that could be at fault. One of the primary culprits is low engine oil, which can lead to inadequate lubrication and cause engine components to rub together, resulting in a ticking sound. Additionally, worn valve train components, such as lifters, pushrods, or rocker arms, may also contribute to this noise, indicating that these parts may need replacement. Another potential issue is faulty fuel injectors; if they are malfunctioning, they can create a ticking sound during operation. An exhaust leak is another possibility, as it can produce a ticking noise, particularly noticeable when the engine is running. Lastly, timing chain issues can also manifest as ticking sounds, suggesting that the timing chain may be misaligned or worn. Addressing these issues promptly is essential to prevent further damage, and while some DIY enthusiasts may feel comfortable investigating these problems, consulting a mechanic for a thorough inspection is always a wise choice to ensure accurate diagnosis and repair.

How urgent is it to address the ticking noise in my 2021 Hyundai Sonata's engine?

When you hear a ticking noise in your 2021 Hyundai Sonata's engine, it is crucial to act swiftly. Early detection of such sounds can be the difference between a minor fix and a major repair, as the ticking could indicate low oil levels, worn components, or valve issues. Ignoring this noise not only risks escalating the problem but can also compromise your vehicle's performance and longevity. Moreover, the safety of your vehicle is at stake; a neglected engine issue can lead to breakdowns or more severe mechanical failures while driving. Therefore, while you may be tempted to delay addressing the ticking noise, it is advisable to investigate the cause as soon as possible, either through a DIY inspection or by consulting a professional mechanic. Taking prompt action will help ensure your Sonata remains reliable and safe on the road.

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