2016 Mitsubishi Outlander Has Rough Idle

Common Causes of Rough Idling in Your 2016 Mitsubishi Outlander 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 2016 Mitsubishi Outlander 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 2016 Mitsubishi Outlander 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 initial diagnostic steps to take for a rough idle in a 2016 Mitsubishi Outlander?

When faced with a rough idle in your 2016 Mitsubishi Outlander, it's essential to adopt a systematic diagnostic approach to identify the root cause effectively. Start by checking the spark plugs, as worn or faulty plugs can significantly impact engine performance. Next, inspect the air filter; a clogged filter can restrict airflow, leading to an uneven idle. Following this, examine the fuel system, including the fuel filter and injectors, since blockages here can also contribute to the problem. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, inspect the idle air control valve, as a malfunctioning valve can disrupt the engine's idle speed. Lastly, be vigilant for vacuum leaks, which can alter the air-fuel mixture and exacerbate idle problems. By methodically addressing these areas, you can effectively troubleshoot and resolve the rough idle issue in your Outlander.

What are the common causes of a rough idle in a 2016 Mitsubishi Outlander?

When dealing with a rough idle in your 2016 Mitsubishi Outlander, it's crucial 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. 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. Furthermore, a malfunctioning Mass Airflow Sensor (MAF) can throw off the air-fuel mixture, exacerbating the problem. Lastly, issues with the Exhaust Gas Recirculation (EGR) valve can interfere with the combustion process, leading to an uneven idle. By identifying and addressing these common causes, you can restore your Outlander's performance and enjoy a smoother driving experience.

How urgent is it to address the rough idle in a 2016 Mitsubishi Outlander?

Addressing a rough idle in your 2016 Mitsubishi Outlander is not just a matter of comfort; it is crucial for the vehicle's overall health and performance. A rough idle can indicate underlying engine problems, such as faulty spark plugs, fuel system malfunctions, or air intake issues, which, if left unattended, can escalate into more severe complications. Ignoring these symptoms may lead to decreased fuel efficiency and poor vehicle performance, ultimately resulting in costly repairs. Moreover, a rough idle can sometimes signal serious issues that could compromise safety, making it imperative to act swiftly. Regular maintenance and prompt attention to such symptoms not only enhance your driving experience but also prolong the life of your vehicle. Therefore, if you notice a rough idle, it is advisable to investigate and resolve the issue as soon as possible to avoid further complications and ensure a reliable and safe driving experience.

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2016 Mitsubishi Outlander Rough Idle: Causes & Solutions