2020 Land Rover Range Rover Sport Has Rough Idle

Resolve Rough Idle in 2020 Land Rover Range Rover Sport

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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 2020 Land Rover Range Rover Sport 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 2020 Land Rover Range Rover Sport 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 2020 Land Rover Range Rover Sport?

To effectively diagnose a rough idle in your 2020 Land Rover Range Rover Sport, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by using an OBD-II scanner to identify any fault codes, as these can pinpoint specific issues within the vehicle's systems. Next, inspect the spark plugs for wear or fouling, since these components play a crucial role in engine performance. A clean air filter is essential for optimal airflow, so ensure it is free from debris. Additionally, examine the vacuum hoses for any signs of damage or disconnection, as leaks can significantly impact idle quality. Moving on, assess the fuel system, including the fuel filter and injectors, to rule out clogs or malfunctions. The mass airflow sensor should also be tested, as its accuracy is vital for maintaining the correct air-fuel mixture. Don’t forget to check the throttle body for carbon buildup, which can hinder its function, and ensure the PCV valve is operating correctly. By following this structured diagnostic approach, you can effectively identify and resolve the underlying causes of a rough idle in your vehicle.

What are the common causes of rough idle in a 2020 Land Rover Range Rover Sport?

When dealing with a rough idle in your 2020 Land Rover Range Rover Sport, it's essential to understand the common problems that could be at play. One of the primary culprits is a dirty or clogged air filter, which can significantly restrict airflow to the engine, leading to performance issues. Additionally, faulty spark plugs are notorious for causing misfires, which can manifest as a rough idle. Fuel system problems, such as clogged fuel filters or injectors, can also disrupt the engine's performance, particularly at idle. Another potential issue is vacuum leaks, which can upset the delicate air-fuel mixture necessary for smooth operation. Furthermore, a malfunctioning mass airflow sensor (MAF) can lead to incorrect air-fuel ratios, exacerbating idle problems. Lastly, don't overlook the ignition system; faulty ignition coils or distributors can contribute to rough idling as well. By systematically checking these areas, you can effectively diagnose and address the rough idle issue in your vehicle.

How urgent is it to address the rough idle in a 2020 Land Rover Range Rover Sport?

Addressing a rough idle in your 2020 Land Rover Range Rover Sport should not be overlooked, as it can indicate deeper issues that may escalate if left unattended. A rough idle often points to problems such as fuel delivery issues, ignition system failures, or even vacuum leaks, all of which can lead to decreased engine performance and efficiency. If you notice your vehicle shaking or vibrating while idling, it’s crucial to investigate the cause promptly. Ignoring these symptoms can result in more severe complications, including engine misfires or damage to critical components, which could lead to costly repairs. For DIY enthusiasts, taking the time to diagnose and resolve a rough idle can not only enhance your vehicle's performance but also save you money in the long run. Regular maintenance checks and timely repairs are essential to ensure your Range Rover Sport remains in optimal condition, allowing you to enjoy a smooth and safe driving experience.

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