2022 Jeep Grand Wagoneer Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2022 Jeep Grand Wagoneer and How to Resolve Them

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 2022 Jeep Grand Wagoneer 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 2022 Jeep Grand Wagoneer 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 2022 Jeep Grand Wagoneer?

When faced with a rough idle in your 2022 Jeep Grand Wagoneer, it's essential to approach the diagnosis methodically. Start by checking for error codes using an OBD-II scanner, as these codes can quickly point you to specific issues within the engine. Next, inspect the spark plugs; ensuring they are clean and functioning properly is crucial, as worn plugs can significantly impact engine performance. Following this, evaluate the air filter for any dirt or clogs that may restrict airflow, which can also lead to rough idling. It's equally important to check for vacuum leaks in the intake system, as these can disrupt the air-fuel mixture. Additionally, inspect the fuel system components, including the fuel filter and injectors, to ensure they are delivering fuel effectively. Finally, examine the throttle body for any carbon buildup or obstructions that could hinder airflow. By systematically addressing these areas, you can effectively diagnose and resolve the rough idle issue in your vehicle.

What are the common problems that could cause a rough idle in a 2022 Jeep Grand Wagoneer?

When diagnosing a rough idle in a 2022 Jeep Grand Wagoneer, it's essential to consider several common problems that could be affecting engine performance. One of the primary culprits is a dirty or clogged air filter, which can significantly restrict airflow to the engine, leading to an uneven idle. Additionally, faulty spark plugs may cause misfiring, resulting in a noticeable roughness during idling. Another potential issue is vacuum leaks, which can disrupt the air-fuel mixture and further exacerbate idle problems. Fuel system issues, such as a clogged fuel filter or a malfunctioning fuel pump, can also hinder proper fuel delivery, contributing to a rough idle. Furthermore, a malfunctioning oxygen sensor can lead to incorrect adjustments in the air-fuel ratio, while throttle body issues, including carbon buildup or a faulty throttle position sensor, can affect idle speed. By addressing these common problems through regular maintenance and timely repairs, you can effectively resolve the rough idle issue in your Jeep Grand Wagoneer.

How urgent is it to address the rough idle in a 2022 Jeep Grand Wagoneer?

Addressing a rough idle in your 2022 Jeep Grand Wagoneer should be treated with a sense of urgency, as neglecting this issue can lead to more severe engine problems and decreased vehicle performance. A rough idle often indicates underlying issues such as fuel delivery problems, ignition system failures, or even vacuum leaks, which can progressively worsen if not addressed. By taking the time to diagnose and resolve these symptoms early, you not only enhance your vehicle's fuel efficiency but also prevent potential damage that could result in costly repairs. Regular maintenance checks and timely interventions are key to ensuring your Grand Wagoneer operates smoothly and reliably. Therefore, while it may not seem like an immediate emergency, prioritizing the resolution of a rough idle is essential for maintaining the longevity and performance of your vehicle.

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.