2012 Buick Verano Engine Is Stalling

Common Causes of Engine Stalling in Your 2012 Buick Verano and How to Resolve Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Fuel System
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15% chance it's the
Air Intake System
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55% chance it's
Something else
The most common reasons a 2012 Buick Verano engine is stalling are the fuel system, the air intake system, or the ignition system.
  • Fuel System: A clogged fuel filter or failing fuel pump can restrict fuel flow, resulting in poor engine performance and starting issues.
  • Air Intake System: A dirty or damaged air filter or a malfunctioning mass airflow sensor can restrict airflow, leading to reduced engine performance and efficiency.
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 2012 Buick Verano engine is stalling?

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.

If the MAF sensor sends an erroneous signal, a few things happen. The engine's computer will trigger the check engine light, and the on-board diagnostic (OBD) trouble codes will reflect the airflow discrepancy noted by the MAF sensor. Depending on the reported volume of air, the engine may try to compensate for these conditions, causing the engine to burn excessive amounts of fuel and emit black smoke from the exhaust. In this case, the OBD trouble codes would also reference faults recognized by the exhaust oxygen sensors. The engine may also have issues with idling roughly, failing to start, stalling, hesitation, power loss, misfires, and fuel consumption.

»MORE: Signs of a failing mass airflow sensor

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

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.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take when a 2012 Buick Verano's engine is stalling?

When troubleshooting engine stalling in a 2012 Buick Verano, it's essential to adopt a systematic diagnostic approach. Start by checking the oil level, as low oil can trigger issues that lead to stalling. Next, inspect the fuel system for any blockages or malfunctions, as these can significantly impact engine performance. Utilizing an OBD scanner to scan for trouble codes is a crucial step, as it can reveal specific problems that need addressing. Pay close attention to the condition of various sensors; faulty sensors can disrupt engine operation, so consider replacing any that show signs of failure. Additionally, inspect the solenoids, as their proper functioning is vital for engine stability. Lastly, if the check engine light is on, it’s important to investigate the cause immediately, as neglecting this warning can exacerbate the stalling issue. By following these steps, you can effectively diagnose and address the stalling problem in your Buick Verano, ensuring a smoother driving experience.

What are the common problems that could cause the engine to stall in a 2012 Buick Verano?

When diagnosing engine stalling in a 2012 Buick Verano, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty mass airflow sensor, which can disrupt the air-fuel mixture necessary for optimal engine performance. Additionally, dirty or clogged fuel injectors can hinder fuel delivery, leading to stalling. The ignition system also plays a critical role; issues such as worn spark plugs or a failing ignition coil can prevent the engine from running smoothly. Another significant factor is the fuel pump; if it is malfunctioning, the engine may not receive enough fuel, resulting in stalling. Furthermore, vacuum leaks can alter the air-fuel ratio, causing performance issues. A malfunctioning throttle position sensor can also impact engine behavior, while a clogged air filter may restrict airflow, further exacerbating stalling problems. For those looking to tackle these issues themselves, a thorough inspection of these components can help identify the root cause of the stalling and guide necessary repairs.

How urgent is it to address the engine stalling issue in a 2012 Buick Verano?

When it comes to a 2012 Buick Verano experiencing engine stalling, the urgency of addressing this issue cannot be overstated. Engine stalling can occur without warning, posing a significant safety risk as it may lead to loss of control while driving, increasing the likelihood of accidents. Moreover, neglecting this problem can exacerbate existing issues, potentially resulting in more severe damage to critical components, which can lead to costly repairs down the line. For DIY enthusiasts, understanding that engine stalling not only affects the vehicle's drivability but also its overall performance is crucial. Promptly diagnosing and resolving the stalling issue can prevent further complications, ensuring the vehicle remains reliable and safe for everyday use. Therefore, if you notice any signs of stalling, it is advisable to take immediate action to safeguard both your safety and the longevity of your Buick Verano.

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