2016 Buick Verano Has A Vacuum Leak

Diagnosing Vacuum Leaks in Your 2016 Buick Verano: Symptoms, Causes, and Repair Solutions

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Leaking Vacuum Hoses
0%
30% chance it's the
Leaking Gaskets and Seals
0%
20% chance it's the
Bad Actuators and Valves
0%
10% chance it's
Something else
The most common reasons a 2016 Buick Verano has a vacuum leak are leaking vacuum hoses, leaking gaskets and seals, or bad actuators and valves.
  • Leaking Vacuum Hoses: A cracked or disconnected vacuum hose can lead to a loss of engine vacuum, resulting in poor engine performance and increased fuel consumption.
  • Leaking Gaskets and Seals: Aged or damaged gaskets and seals can lead to fluid leaks, resulting in loss of engine oil or coolant and potential engine damage.
  • Bad Actuators and Valves: A malfunctioning actuator or valve can disrupt the proper operation of the vehicle's systems, leading to issues such as poor engine performance or erratic behavior of components like the HVAC system.
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 2016 Buick Verano has a vacuum leak?

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.

Problems with the intake manifold gasket can create the following symptoms:

  • Illuminated check engine light
  • Erratic engine performance
  • Oil and coolant leaks
  • Poor gas mileage
  • Stalling

» LEARN MORE: Intake manifold gasket symptoms

A bad valve cover gasket will result in an oil leak. You may notice oil under the car or on other parts under the hood. You might also notice a burning smell while driving.

» LEARN MORE: Signs of a bad valve cover gasket

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

What are the steps to diagnose a vacuum leak in a 2016 Buick Verano?

To effectively diagnose a vacuum leak in your 2016 Buick Verano, start with a thorough visual inspection of the vacuum hoses. Look for any visible signs of damage, such as cracks or loose connections, which are often the culprits behind leaks. Next, listen carefully for any hissing or whistling sounds while the engine is running, as these noises can indicate escaping air. If the issue remains elusive, consider using a smoke machine to introduce smoke into the vacuum system; this method allows you to visually pinpoint the source of the leak. Alternatively, spraying soapy water on the hoses and connections can also reveal leaks, as bubbles will form at the site of any escaping air. For a more precise assessment, utilize a vacuum gauge to measure the system's pressure; abnormal readings can signal a leak. Finally, don’t forget to inspect the intake manifold gasket for wear or damage, as this component can also contribute to vacuum issues. By following these steps, you can systematically identify and address any vacuum leaks, ensuring your vehicle runs smoothly.

What are the common causes and symptoms of a vacuum leak in a 2016 Buick Verano?

When tackling a vacuum leak in your 2016 Buick Verano, it's essential to understand the common problems that can arise. One of the primary culprits is damaged or deteriorated vacuum hoses, which can lead to air entering the system improperly. Additionally, loose or disconnected hose connections can create gaps that disrupt the vacuum pressure. A faulty intake manifold gasket or a cracked intake manifold can also contribute to leaks, affecting engine performance. Furthermore, a malfunctioning PCV valve may not regulate airflow correctly, exacerbating the issue. Symptoms of a vacuum leak often include rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light. You might also notice unusual hissing or whistling noises from the engine bay, along with a noticeable loss of power during acceleration. By being aware of these common causes and symptoms, you can take proactive steps to diagnose and resolve vacuum leaks, ensuring your vehicle runs smoothly and efficiently.

How urgent is it to address a vacuum leak in a 2016 Buick Verano to prevent potential engine damage?

Addressing a vacuum leak in a 2016 Buick Verano is of utmost importance due to the serious implications it can have on engine performance and longevity. A vacuum leak can disrupt the air-fuel mixture, leading to rough idling, stalling, and decreased fuel efficiency. If left unattended, the engine may run lean, which not only affects performance but can also cause overheating and significant damage to engine components over time. The urgency to fix this issue cannot be overstated, as neglecting it may result in costly repairs and a compromised vehicle safety. Therefore, it is advisable for DIY enthusiasts to diagnose and repair any signs of a vacuum leak as soon as possible to maintain optimal engine health and prevent further complications.

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