2013 Scion XD Has Rough Idle

Diagnosing Causes of Rough Idle in Your 2013 Scion xD and Solutions 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 2013 Scion xD has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
  • Spark Plugs: A worn or fouled spark plug can cause misfires, rough idling, and decreased fuel efficiency due to incomplete combustion.
  • 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 2013 Scion xD 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.

Customers with drum brake systems often specify they have lost braking power, or that the vehicle's brakes are making noise. This is because brake drums do not dissipate heat very well, so the heat from hard braking will cause stress fractures. These fractures make can make noise on the brake shoes as the drum revolves around the shoes. Lastly, the brake shoes may not be problematic, but may cause a grinding noise while stopping. This would indicate the shoes have no braking material left, and the brake shoes must be changed before the vehicle can be safely driven.

Learn more about brake shoe symptoms

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 2013 Scion xD?

When faced with a rough idle in your 2013 Scion xD, it's essential to adopt a systematic diagnostic approach to identify the root cause. Start by checking for any trouble codes using an OBD-II scanner, as this can provide valuable insights into potential issues. If no codes are present, inspect the vacuum system for leaks, as even minor leaks can disrupt engine performance. Next, clean the throttle body and Mass Airflow Sensor (MAF) to eliminate any dirt or debris that may hinder airflow. It's also crucial to examine the spark plugs for wear or damage, as faulty plugs can lead to misfires and rough idling. Testing the fuel pressure will help ensure that the engine is receiving adequate fuel, while checking the engine's compression can reveal underlying mechanical issues. Additionally, inspect the fuel injectors for proper operation, as inconsistent fuel delivery can contribute to idle problems. Finally, evaluate the throttle body and ignition components, including coils and wires, to rule out any faults that could be affecting engine stability. By following these steps, you can effectively diagnose and address the rough idle in your Scion xD, potentially saving time and repair costs.

What are the common problems that could cause a rough idle in a 2013 Scion xD?

When dealing with a rough idle in a 2013 Scion xD, it's crucial to understand the common problems that could be at play. One of the primary culprits is a vacuum leak, which can disrupt the air-fuel mixture and lead to an unstable idle. Additionally, spark plug issues are frequent offenders; worn or faulty spark plugs can cause misfires, resulting in a rough engine performance. Ignition coil problems also contribute significantly, as a failing coil can trigger a check engine light and diminish overall engine efficiency. Misfiring, particularly from specific cylinders, can exacerbate the rough idle, making it essential to check for cylinder-specific issues. Fuel injector problems may also be a factor, as clogged or malfunctioning injectors can lead to poor throttle response and rough starts. Lastly, a malfunctioning throttle body can mimic symptoms of other issues, complicating the diagnosis. By systematically checking these components, DIYers can effectively identify and resolve the underlying causes of a rough idle in their Scion xD.

How urgent is it to address the rough idle in my 2013 Scion xD?

When it comes to your 2013 Scion xD, addressing a rough idle should be a priority, even if it doesn't seem like an immediate emergency. This symptom can indicate underlying issues such as faulty fuel injectors, vacuum leaks, or problems with spark plugs and ignition coils. Ignoring these signs can lead to more severe complications, including engine stalling, reduced fuel efficiency, and potential damage to critical engine components. For DIY enthusiasts, it's essential to recognize that timely intervention not only helps maintain your vehicle's performance but also extends its lifespan. If you notice additional symptoms like engine shaking or unusual noises, it's a clear signal to take action. By diagnosing and resolving the rough idle promptly, you can prevent further issues and ensure your Scion xD runs smoothly for years to come.

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