2022 Mazda CX-5 Has Rough Idle

Troubleshooting Causes of Rough Idle in Your 2022 Mazda CX-5 and How to Restore Smooth Performance

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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 2022 Mazda CX-5 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 2022 Mazda CX-5 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 steps to diagnose a rough idle in a 2022 Mazda CX-5?

When diagnosing a rough idle in a 2022 Mazda CX-5, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by using an OBD-II scanner to identify any error codes that may indicate underlying issues. This initial step can save time and direct your focus to specific components. Next, inspect the spark plugs for wear or fouling, as these can significantly affect engine performance. A clean air filter is crucial for optimal airflow, so ensure it is free from dirt and debris. Additionally, examine the vacuum hoses for any signs of damage or leaks, which can disrupt engine function. Testing the mass airflow sensor is also vital, as a malfunction here can lead to an improper air-fuel mixture. Don’t overlook the fuel system; check for clogged injectors or fuel pump issues that could hinder fuel delivery. Finally, assess the throttle body and EGR valve, as both play critical roles in maintaining smooth idle. By following this structured diagnostic approach, you can effectively identify and resolve the causes of rough idling, ensuring your Mazda CX-5 runs smoothly.

What are the common problems that could cause a rough idle in a 2022 Mazda CX-5?

When dealing with a rough idle in your 2022 Mazda CX-5, it's essential to consider several common problems that could be affecting your vehicle's performance. One of the first areas to check is the air filter; a dirty or clogged air filter can significantly restrict airflow to the engine, leading to an uneven idle. Additionally, inspect the spark plugs, as worn or faulty plugs can cause misfiring, which directly contributes to rough idling. Another critical component to examine is the vacuum system for any leaks, as these can disrupt the air-fuel mixture necessary for smooth engine operation. Fuel system issues, such as a clogged fuel filter or a malfunctioning fuel pump, can also impact performance and should not be overlooked. Furthermore, the Mass Airflow Sensor (MAF) plays a vital role in regulating the engine's air intake; if it's malfunctioning, it can lead to an improper air-fuel mixture, resulting in a rough idle. Lastly, consider the Exhaust Gas Recirculation (EGR) valve, as a faulty EGR can disrupt the combustion process, further contributing to idle issues. By systematically addressing these potential problems, you can effectively troubleshoot and resolve rough idle concerns in your Mazda CX-5, ensuring optimal engine performance.

How urgent is it to address the rough idle in my 2022 Mazda CX-5?

Addressing a rough idle in your 2022 Mazda CX-5 is not just a matter of comfort; it is crucial for the overall health of your vehicle. A rough idle can signal serious underlying problems, such as engine misfires or issues with fuel delivery, which, if left unattended, can escalate into more significant and costly repairs. Moreover, neglecting this symptom can lead to decreased fuel efficiency, resulting in higher operating costs over time. The longer you wait to address the issue, the more likely it is that you will face severe engine damage, which could compromise your vehicle's safety and performance. Therefore, it is essential to prioritize this concern and take immediate action to diagnose and resolve the rough idle, ensuring your Mazda CX-5 remains reliable and efficient on the road.

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