The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2017 Encore 1.4L Turbo Loss of Power and Whining Noise

0

Mike T. · rep 0 · May 22, 3:49 AM · 1 replies · solved · Question

Vehicle: 2017 Buick Encore Preferred

My 2017 Buick Encore, with the 1.4L turbo engine, has developed a concerning issue. For the past few weeks, I've noticed a significant loss of power, especially when accelerating onto the highway. It feels sluggish and struggles to get up to speed.

In addition to the power loss, there's a distinct whining noise coming from the engine bay, which seems to get louder under acceleration. I'm worried this might be related to the turbocharger. Has anyone experienced similar symptoms with their Encore? Could it be a common problem for this model year?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:49 AM

0

ClearTheCode admin answer:

The symptoms you're describing for your 2017 Buick Encore 1.4L turbo, specifically loss of power and a whining noise under acceleration, are classic indicators of a potential issue with the turbocharger system or related components.

Common Causes & Diagnostics:

  1. Failing Turbocharger: The most direct cause. A worn or damaged turbocharger bearing can produce a distinct whining or whistling sound. If the turbo isn't spooling correctly, you'll experience a significant loss of boost and engine power. This can trigger codes like P0299 (Turbocharger/Supercharger Underboost) or P0234 (Turbocharger/Supercharger Overboost).
  2. Boost Leak: A crack in an intercooler hose, a loose clamp, or a faulty diverter/bypass valve can lead to a boost leak, reducing the pressure reaching the engine and causing power loss. You might hear a hissing sound in addition to the whine.
  3. Wastegate Actuator Issues: The wastegate controls exhaust gas flow to the turbo. If it's stuck open or malfunctioning, the turbo won't build sufficient boost. This can also lead to P0299.
  4. Clogged Catalytic Converter: While less common for a whine, a severely restricted exhaust system (like a clogged catalytic converter) can cause significant power loss and sometimes a muffled exhaust noise. This would typically trigger P0420 (Catalyst System Efficiency Below Threshold).
  5. PCV System Issues: Problems with the PCV (Positive Crankcase Ventilation) system, especially on these 1.4L engines, can sometimes mimic turbo issues or create vacuum leaks that affect engine performance.

When to See a Shop:

  • Immediately: If the whining noise becomes very loud, or if you notice smoke from the exhaust or engine bay.
  • Soon: If the power loss is consistent and the check engine light is on. A diagnostic scan is essential to retrieve any stored DTCs. A technician can perform a boost pressure test, inspect the turbocharger for shaft play, and check all associated hoses and valves to accurately diagnose the problem.
Menu

Help & account