10 Common 2015 Buick Encore Problems (With Fixes)

The 2015 Buick Encore is a popular compact SUV known for its comfortable ride and stylish design.

However, like any vehicle, it has its share of issues. If you own a 2015 Buick Encore, you might encounter some of these common problems.

Understanding what causes them and how to fix them can save you time, money, and frustration.

Let’s explore the most frequent 2015 Buick Encore problems and what you can do about them.

1. Engine Stalling or Hesitation

Cause

The engine may stall or hesitate due to a faulty throttle body or issues with the fuel system.

Carbon buildup on the throttle body can restrict airflow, while a clogged fuel filter or weak fuel pump can disrupt fuel delivery to the engine.

Fixes

Clean the throttle body to remove carbon deposits. If that doesn’t work, replace the fuel filter and check the fuel pump’s pressure.

In some cases, updating the engine control module (ECM) software at a dealership can resolve the issue.

2. Transmission Jerking or Shuddering

Cause

This problem often stems from low or contaminated transmission fluid.

The 2015 Encore’s six-speed automatic transmission is sensitive to fluid quality, and worn-out fluid can cause rough shifting or shuddering during acceleration.

Fixes

Check the transmission fluid level and condition.

If it’s low or dirty, perform a transmission fluid change.

Use the manufacturer-recommended fluid type. If the problem persists, have a mechanic inspect the transmission for internal wear or damage.

3. Water Leaks into the Cabin

Cause

Water leaking into the cabin is usually caused by clogged sunroof drains or worn weatherstripping around the doors and windows.

Debris can block the drainage tubes, causing water to overflow into the interior.

Fixes

Inspect and clear the sunroof drain tubes using compressed air or a flexible wire.

Check the weatherstripping for cracks or gaps and replace it if necessary.

Regularly cleaning these areas can prevent future leaks.

4. Turbocharger Failure

Cause

The 2015 Buick Encore’s 1.4L turbocharged engine can experience turbocharger failure due to oil starvation or contamination.

If oil changes are neglected or low-quality oil is used, the turbo’s bearings can wear out prematurely.

Fixes

Always use high-quality synthetic oil and follow the recommended oil change intervals.

If the turbocharger has failed, it will need to be replaced by a professional mechanic.

Regular maintenance is key to preventing this expensive repair.

5. Power Steering Issues

Cause

Some owners report intermittent loss of power steering assist, which is often caused by a failing electric power steering motor or sensor.

Electrical faults in the steering system can also trigger warning lights on the dashboard.

Fixes

Have the power steering system diagnosed with a scan tool to identify error codes.

The electric steering motor or related sensors may need replacement.

Ensure all electrical connections are secure and free from corrosion.

6. Check Engine Light and Reduced Engine Power

Cause

The check engine light may illuminate alongside a “reduced engine power” message due to issues with the throttle position sensor, accelerator pedal sensor, or the ECM.

These components control how much power the engine delivers.

Fixes

Use an OBD-II scanner to read the trouble codes. Common fixes include cleaning or replacing the throttle body, replacing faulty sensors, or updating the ECM software.

Addressing the issue promptly prevents further engine damage.

7. Faulty Ignition Coils

Cause

Ignition coil failure is a known issue in the 2015 Encore. When a coil fails, it can cause misfires, rough idling, and poor fuel economy.

This often happens due to heat stress or manufacturing defects.

Fixes

Replace the faulty ignition coil(s) and spark plugs if needed. It’s a good idea to replace all coils at once to prevent future issues.

Regular tune-ups help catch coil problems before they cause noticeable symptoms.

8. Coolant Leaks

Cause

Coolant leaks can occur from cracked hoses, a failing water pump, or a damaged radiator.

The 2015 Encore’s cooling system is under constant pressure, which can cause components to wear out over time.

Fixes

Inspect the cooling system for visible leaks. Replace any damaged hoses, the water pump, or the radiator as needed.

Always use the correct type of coolant and maintain proper coolant levels to prevent overheating.

9. Brake Problems

Cause

Brake issues such as squeaking, grinding, or reduced stopping power can result from worn brake pads, warped rotors, or contaminated brake fluid.

The Encore’s braking system requires regular maintenance to function properly.

Fixes

Inspect the brake pads and rotors for wear. Replace pads if they’re thin and resurface or replace warped rotors.

Flush and replace the brake fluid every two years to maintain optimal braking performance.

10. Electrical System Malfunctions

Cause

Electrical problems like flickering lights, malfunctioning infotainment systems, or dead batteries can be traced to a weak battery, corroded terminals, or faulty alternator.

The 2015 Encore’s complex electrical system is sensitive to power issues.

Fixes

Test the battery and alternator to ensure they’re working correctly.

Clean corroded battery terminals with a wire brush and baking soda solution.

If the battery is old or weak, replace it with a new one rated for your vehicle.

FAQs

What is the most serious problem with the 2015 Buick Encore?

Turbocharger failure is one of the most serious and expensive issues. Prevent it by using quality oil and keeping up with regular maintenance.

Why does my 2015 Encore shake when accelerating?

This is often caused by transmission shuddering due to low or dirty transmission fluid. A fluid change usually resolves the issue.

How do I stop water from leaking into my Encore?

Clear clogged sunroof drains and inspect weatherstripping around doors and windows. Replacing damaged seals will stop most leaks.

Can I drive my Encore with the check engine light on?

It depends on the issue. If you see “reduced engine power,” have it checked immediately. Other codes may be less urgent but should still be diagnosed soon.