2017 Lexus RX450h Engine Makes A Ticking Noise

Common Causes of Ticking Noises in Your 2017 Lexus RX450h Engine and How to Address Them

Find Repair Location
Reviewed by
Andrew Hajjar
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 2017 Lexus RX450h 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 2017 Lexus RX450h 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.

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 2017 Lexus RX450h, and how should I diagnose them?

To effectively diagnose the ticking noise in your 2017 Lexus RX450h, begin with the most straightforward checks. Start by inspecting the engine oil level; low oil can lead to inadequate lubrication, resulting in ticking sounds. If the oil level is fine, examine the valve lifters for any signs of wear or damage, as these components can also produce similar noises when they are not functioning correctly. Next, consider the fuel injectors; a malfunction here can contribute to the ticking sound, so a thorough inspection is warranted. If these components check out, turn your attention to the timing chain, ensuring it is neither loose nor damaged, as issues here can create a ticking noise as well. Lastly, inspect the exhaust system for any leaks, as these can sometimes mimic engine ticking. If you are unable to identify the source of the noise after these checks, it may be time to consult a professional mechanic who can provide a more detailed diagnosis using specialized tools. By following this structured approach, you can systematically 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 2017 Lexus RX450h?

When you hear a ticking noise in the engine of your 2017 Lexus RX450h, it can be concerning, but understanding the common problems can help you troubleshoot effectively. 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 or rocker arms, may also contribute to this noise, indicating that these parts may need replacement. Another possibility is faulty fuel injectors; if they are malfunctioning, they can create a ticking sound during operation. An exhaust leak is another issue to consider, as it can produce a ticking noise, particularly noticeable when the engine is running. Lastly, problems with the timing belt or chain can lead to similar sounds, as these components interact with others in the engine. While some of these issues can be diagnosed and addressed through DIY methods, it is advisable to consult a qualified mechanic for a thorough evaluation to ensure the problem is accurately identified and resolved, preventing further damage to your vehicle. Regular maintenance and prompt attention to unusual noises can help keep your Lexus RX450h running smoothly.

How urgent is it to address the ticking noise in the engine of a 2017 Lexus RX450h?

Addressing a ticking noise in the engine of a 2017 Lexus RX450h is not just a matter of convenience; it is a critical step in maintaining the vehicle's health and performance. Ignoring this symptom can lead to serious consequences, including extensive engine damage and costly repairs. The ticking sound may indicate low oil levels, which can cause insufficient lubrication and lead to premature wear of engine components. Additionally, it could signal issues with the valvetrain, which, if left unchecked, might result in catastrophic engine failure. For DIY enthusiasts, it is essential to recognize that while some engine noises may seem minor, they can escalate quickly. Therefore, conducting a thorough inspection and diagnosing the issue promptly is vital. Regular maintenance and immediate attention to unusual sounds not only enhance the longevity of your Lexus RX450h but also ensure a safer driving experience. Taking action now can save you from more significant headaches down the road, making it imperative to address that ticking noise without delay.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.