2015 Volvo XC60 Has Rough Idle

Common Causes of Rough Idling in Your 2015 Volvo XC60 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 2015 Volvo XC60 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 2015 Volvo XC60 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 steps to diagnose a rough idle in a 2015 Volvo XC60?

To effectively diagnose a rough idle in your 2015 Volvo XC60, start with a systematic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the coolant temperature sensor, as a malfunction here can significantly impact engine performance. Next, listen for any hissing sounds that may indicate vacuum leaks, and visually examine the vacuum lines for any signs of wear or damage. If these initial checks do not reveal the problem, proceed to assess the idle air control system, particularly if you encounter a P0505 error code. Additionally, inspect the spark plugs for wear, as old plugs can lead to poor combustion and rough idling. Finally, consider the overall health of the engine, including the ignition system and battery, as these components can also contribute to idle irregularities. By following this structured diagnostic approach, you can efficiently identify and resolve the underlying causes of a rough idle in your vehicle.

What are the common problems that could cause a rough idle in a 2015 Volvo XC60?

When experiencing a rough idle in your 2015 Volvo XC60, several common problems may be at play. One significant culprit could be a malfunctioning crankshaft position sensor, which can lead to irregular RPM fluctuations and vibrations while idling. Additionally, a faulty coolant temperature sensor may send incorrect data to the engine control unit (ECU), resulting in rough idling and even engine stalling. Another issue to consider is the oxygen (O2) sensor; if it sends low voltage signals, it can disrupt the air-fuel mixture, causing uneven running and vibrations. Furthermore, problems with the instrument cluster, such as a defective unit or a blown fuse, can also impact idle performance. Lastly, vacuum leaks are notorious for causing high idle situations, which can further complicate the engine's RPM stability. By identifying these potential issues, DIYers can take the necessary steps to troubleshoot and resolve the rough idle, ensuring their vehicle runs smoothly.

How urgent is it to address the rough idle in my 2015 Volvo XC60?

Addressing a rough idle in your 2015 Volvo XC60 is crucial for maintaining the vehicle's performance and safety. Ignoring this symptom can lead to a cascade of problems, including decreased fuel efficiency and increased wear on engine components. A rough idle may stem from relatively simple issues, such as a dirty air filter or spark plugs, but it can also indicate more serious concerns like a defective oil control valve or malfunctioning coolant temperature sensors. These underlying problems can compromise engine performance and, if left unchecked, may result in costly repairs down the line. Therefore, it is essential to diagnose and resolve the root cause of the rough idle promptly. By doing so, you not only enhance the driving experience but also safeguard your vehicle against further damage, ensuring it remains reliable and safe on the road.

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2015 Volvo XC60 Rough Idle Causes & Repair Costs | RepairPal