2023 Mitsubishi Outlander PHEV Has Rough Idle

Resolve Rough Idle in Your 2023 Mitsubishi Outlander PHEV for a Smoother Ride

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Reviewed by
Andrew Hajjar
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 2023 Mitsubishi Outlander PHEV 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 2023 Mitsubishi Outlander PHEV 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 2023 Mitsubishi Outlander PHEV?

When faced with a rough idle in your 2023 Mitsubishi Outlander PHEV, start by checking the spark plugs, as they play a crucial role in engine performance. Worn or damaged spark plugs can lead to misfires, resulting in an uneven idle. Next, inspect the air filter; a clogged filter can restrict airflow, negatively impacting engine efficiency. If these components are in good condition, turn your attention to the throttle body, which regulates air intake. Cleaning it can often resolve idle issues. Additionally, using an OBD-II scanner to check for error codes can provide insights into any underlying problems that may not be immediately visible. Don’t forget to examine vacuum hoses for leaks, as these can disrupt the air-fuel mixture and cause rough idling. Finally, ensure that your fuel system is functioning properly by checking the fuel filter and injectors, as blockages or malfunctions here can also contribute to idle irregularities. By systematically addressing these areas, you can effectively diagnose and potentially resolve the rough idle issue in your vehicle.

What are the common problems that could cause a rough idle in a 2023 Mitsubishi Outlander PHEV?

When dealing with a rough idle in your 2023 Mitsubishi Outlander PHEV, it's essential to understand the common problems that could be causing this issue. 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 may result in misfiring, contributing to an uneven idle. Another potential problem is vacuum leaks, which can disrupt the air-fuel mixture necessary for smooth engine operation. Fuel system issues, such as clogged fuel filters or injectors, can also hinder fuel delivery, exacerbating the rough idle. Furthermore, a malfunctioning throttle body can interfere with the air intake process, while problems with the Engine Control Module (ECM) can lead to sensor malfunctions or software glitches that affect overall engine performance. By identifying and addressing these common issues, you can effectively troubleshoot and resolve the rough idle in your vehicle, ensuring a smoother driving experience.

How urgent is it to address the rough idle in my 2023 Mitsubishi Outlander PHEV?

Addressing a rough idle in your 2023 Mitsubishi Outlander PHEV is crucial for maintaining both safety and performance. A rough idle often indicates underlying engine problems that, if ignored, can escalate into more severe issues, potentially leading to costly repairs. For instance, neglecting this symptom may result in decreased fuel efficiency, making your vehicle less economical to operate. Additionally, drivability issues can arise, affecting your ability to control the vehicle safely. Over time, these problems can cause significant damage to the engine and other components, which could compromise your vehicle's longevity. Therefore, it is essential to prioritize timely repairs and regular maintenance to prevent these complications and ensure your Outlander PHEV continues to perform optimally. Taking action now not only enhances your driving experience but also safeguards your investment in the vehicle.

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