2017 Chevrolet Trax Has Rough Idle

Diagnosing Causes of Rough Idle in Your 2017 Chevrolet Trax and How to Restore Smooth Performance

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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 2017 Chevrolet Trax 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 2017 Chevrolet Trax 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 2017 Chevrolet Trax?

When faced with a rough idle in your 2017 Chevrolet Trax, it's essential to approach the diagnosis methodically. Start by checking for fault codes using an OBD-II scanner, as these codes can reveal specific issues affecting engine performance. Next, inspect the spark plugs; worn or fouled plugs can significantly impact idle quality and may need replacement. Following this, examine the air filter to ensure it is clean and unobstructed, as a clogged filter can restrict airflow and contribute to rough idling. Additionally, check for vacuum leaks by inspecting hoses and connections, since any leaks can disrupt the air-fuel mixture. Don't overlook the throttle body; a buildup of dirt can affect its function, so cleaning it may enhance idle stability. Lastly, assess the mass airflow sensor, as a malfunctioning sensor can lead to incorrect air measurements, further complicating idle issues. By systematically addressing these areas, you can effectively identify and resolve the rough idle in your vehicle.

What are the common causes of a rough idle in a 2017 Chevrolet Trax?

When diagnosing a rough idle in your 2017 Chevrolet Trax, it's crucial to consider several common issues that could be at play. Start by checking the air filter; a dirty or clogged filter can significantly restrict airflow to the engine, leading to performance problems. Next, inspect the spark plugs, as worn or faulty plugs can cause misfiring, which is a primary contributor to rough idling. Additionally, look for vacuum leaks in the system, as these can disrupt the air-fuel mixture and result in an unstable idle. Fuel system components, including the fuel filter and injectors, should also be examined, as clogs or malfunctions here can adversely affect engine performance. Don't overlook the mass airflow sensor; if it's malfunctioning, it can throw off the air-fuel balance, leading to rough idling. Lastly, consider the EGR valve, as issues with this component can interfere with the combustion process. By systematically addressing these potential problems, you can restore smooth idling to your Trax and enhance its overall performance.

How urgent is it to address the rough idle in my 2017 Chevrolet Trax?

Addressing a rough idle in your 2017 Chevrolet Trax is not just a matter of comfort; it is crucial for the overall health of your vehicle. Ignoring this symptom can lead to more severe engine problems, decreased fuel efficiency, and potentially costly repairs down the line. A rough idle often indicates underlying issues such as a malfunctioning fuel injector, a dirty air filter, or even problems with the ignition system. By tackling these issues promptly, you not only enhance your vehicle's performance but also prevent further complications that could compromise safety. For DIY enthusiasts, understanding the urgency of these symptoms can motivate timely action, ensuring that your Trax remains reliable and efficient for years to come. Regular maintenance checks and addressing rough idles as soon as they arise can save you from significant headaches and expenses in the future.

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