2020 Buick Encore Engine Is Stalling

Common Causes of Engine Stalling in Your 2020 Buick Encore 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 2020 Buick Encore 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 2020 Buick Encore 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 2020 Buick Encore's engine is stalling?

When faced with engine stalling in a 2020 Buick Encore, it's essential to adopt a methodical diagnostic approach to identify the root cause effectively. Start by checking for error codes using an OBD-II scanner, as these codes can reveal specific issues within the vehicle's systems. Next, inspect the fuel system, ensuring that the fuel pump, filter, and injectors are functioning correctly and that clean fuel is reaching the engine. Following this, examine the ignition system components, including spark plugs and ignition coils, since any faults here can lead to stalling. It's also crucial to evaluate the air intake system for obstructions or leaks that could disrupt the air-fuel mixture, which is vital for optimal engine performance. Additionally, inspect key sensors like the mass airflow and throttle position sensors, as malfunctioning sensors can significantly impact engine operation. Lastly, verify the health of the battery, as a weak battery can cause electrical issues that may contribute to stalling. By systematically addressing these areas, you can effectively diagnose and resolve the stalling issue in your Buick Encore.

What are the common problems that could cause the engine to stall in a 2020 Buick Encore?

When diagnosing engine stalling in a 2020 Buick Encore, it's essential to consider several common problems that could be affecting performance. One of the primary culprits is a faulty mass airflow sensor, which can disrupt the air-fuel mixture necessary for optimal engine function. Additionally, dirty or clogged fuel injectors may prevent the engine from receiving the correct amount of fuel, leading to stalling. Issues with the ignition system, such as worn spark plugs or a failing ignition coil, can also cause the engine to stall unexpectedly. Another critical area to examine is the fuel pump; if it is failing, it may not deliver sufficient fuel to the engine, resulting in stalling. Furthermore, vacuum leaks can create an imbalance in the air-fuel ratio, contributing to rough idling and stalling. A malfunctioning throttle position sensor can send incorrect data to the engine control unit, exacerbating the stalling issue. Lastly, electrical problems, including a failing alternator or battery, can disrupt engine performance. By systematically checking these components, DIYers can effectively diagnose and address the stalling issue in their Buick Encore.

How urgent is it to address the engine stalling issue in a 2020 Buick Encore?

Addressing the engine stalling issue in a 2020 Buick Encore is of utmost urgency due to the significant safety risks it poses. Stalling can occur unexpectedly while driving, leading to dangerous situations that could result in accidents. Moreover, neglecting this problem can exacerbate existing issues, potentially causing more extensive and costly damage to the vehicle's engine and related components. For DIY enthusiasts, it is crucial to recognize that timely repairs not only enhance the vehicle's reliability but also prevent complications that could arise from prolonged neglect. Regular maintenance and prompt attention to stalling symptoms are essential for ensuring the safety and performance of your Buick Encore, making it imperative to act swiftly when such issues arise.

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