2019 Jeep Compass Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2019 Jeep Compass and How to Resolve Them

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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 Jeep Compass 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 Jeep Compass 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 initial diagnostic steps to take for a rough idle in a 2019 Jeep Compass?

When faced with a rough idle in your 2019 Jeep Compass, it's essential to adopt a methodical diagnostic approach to identify and resolve the issue effectively. Start by checking for fault codes using an OBD-II scanner, as these codes can reveal specific problems within the engine's systems. Next, inspect the air filter; a dirty or clogged filter can significantly hinder airflow, leading to performance issues. Following this, examine the spark plugs for wear or fouling, as these components are crucial for proper ignition and can cause misfires if compromised. Additionally, take a close look at the fuel system, ensuring that the fuel filter is not clogged and that the fuel injectors are functioning correctly. A thorough inspection of the throttle body is also vital, as any dirt or malfunction can disrupt the air-fuel mixture, exacerbating idle problems. Lastly, don't overlook the PCV valve; a faulty valve can contribute to rough idling and should be checked and replaced if necessary. By systematically addressing these areas, you can effectively diagnose and remedy the rough idle in your Jeep Compass, ensuring a smoother driving experience.

What are the common problems that could cause a rough idle in a 2019 Jeep Compass?

When dealing with a rough idle in your 2019 Jeep Compass, it's essential to understand the common problems that could be at play. One of the primary culprits is dirty or faulty spark plugs, which can cause misfiring and lead to an uneven engine performance. Additionally, a clogged air filter can restrict airflow, disrupting the air-fuel mixture necessary for smooth operation. Another issue to consider is vacuum leaks, which can throw off the air-fuel ratio and result in a rough idle. A malfunctioning oxygen sensor may also be responsible, as it plays a crucial role in regulating engine performance. Furthermore, fuel system issues, such as clogged fuel filters or injectors, can significantly impact engine idling. Lastly, a throttle body malfunction, often due to carbon buildup or sensor failure, can contribute to this problem. By regularly maintaining these components and addressing any issues promptly, you can enhance your Jeep's performance and enjoy a smoother driving experience.

How urgent is it to address the rough idle in a 2019 Jeep Compass?

Addressing a rough idle in your 2019 Jeep Compass is not just a matter of comfort; it is crucial for the overall health and safety of your vehicle. A rough idle can indicate underlying engine problems, such as faulty spark plugs or issues within the fuel system, which, if left unattended, may lead to more severe complications like engine misfires or decreased fuel efficiency. Ignoring these symptoms can escalate into costly repairs and may even compromise your vehicle's performance, leading to unsafe driving conditions. Moreover, regular maintenance and prompt attention to such issues can significantly enhance the longevity of your Jeep Compass, ensuring that it operates smoothly and efficiently. Therefore, it is essential to prioritize addressing a rough idle to avoid potential risks and maintain the reliability of your vehicle.

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