2019 Lincoln MKC Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2019 Lincoln MKC and How to Restore Smooth Performance

Find Repair Location
Reviewed by
Bo Fader
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 2019 Lincoln MKC 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 2019 Lincoln MKC 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.

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.

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 2019 Lincoln MKC?

To effectively diagnose a rough idle in your 2019 Lincoln MKC, start by checking for any error codes using an OBD-II scanner, as this can quickly point you to potential issues. Next, inspect the spark plugs for signs of wear or fouling, which can significantly impact engine performance. A clean air filter is essential, so examine it for dirt or clogs that could restrict airflow. Don’t overlook the vacuum hoses; any cracks or leaks can lead to an unstable idle. Ensure the fuel system is in good condition by checking the fuel filter and injectors, as well as verifying fuel pressure. Cleaning the throttle body is also crucial, as carbon buildup can disrupt idle quality. Lastly, assess the PCV valve for faults and consider performing a smoke test to identify any vacuum leaks in the intake system. By following this structured approach, you can effectively diagnose and resolve the rough idle issue in your vehicle.

What are the common causes of a rough idle in a 2019 Lincoln MKC?

When dealing with a rough idle in your 2019 Lincoln MKC, it's crucial to understand the common problems that may 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. Another potential issue is vacuum leaks; these can disrupt the delicate balance of the air-fuel mixture, resulting in an unstable idle. Fuel system problems, such as clogged fuel filters or injectors, can also hinder engine performance and contribute to rough idling. Lastly, a malfunctioning mass airflow sensor can throw off the air-fuel mixture, further exacerbating the issue. By addressing these common causes, you can restore your MKC's performance and enjoy a smoother driving experience.

How urgent is it to address the rough idle in a 2019 Lincoln MKC?

Addressing a rough idle in your 2019 Lincoln MKC should be a priority, as it can indicate underlying engine problems that may worsen over time. Ignoring this symptom can lead to decreased fuel efficiency and poor vehicle performance, ultimately resulting in more costly repairs. While it may not seem like an immediate emergency, the longer you wait, the greater the risk of significant engine damage or safety hazards. Regular maintenance and prompt attention to any irregularities can help you avoid these complications. For those inclined to tackle this issue themselves, consider starting with a thorough inspection of the spark plugs, air filters, and fuel system, as these components often contribute to rough idling. However, if the problem persists, consulting a qualified mechanic is advisable to ensure a comprehensive diagnosis and repair. Taking action sooner rather than later will not only enhance your vehicle's performance but also extend its lifespan.

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.