What Causes Reduced Engine Power in the Buick Verano?
3 Answers
Buick Verano's reduced engine power may be caused by carbon buildup in the engine, fuel system malfunctions, or intake system failures. It is necessary to check whether the intake camshaft solenoid valve and the engine oil pressure solenoid valve are faulty. If faults are found, they should be replaced promptly. Precautions for using car engines: Avoid coasting in neutral: The engine itself has a fuel-cut function during deceleration, and coasting in neutral is not conducive to fuel economy. Stay observant: When oil is found on the ground, determine whether there is an engine oil leak. In such cases, promptly communicate with the car's 4S shop to eliminate potential safety hazards. For vehicles with turbochargers: Do not turn off the engine immediately after high-speed driving or climbing. Let the engine idle for 10 minutes before shutting it down. Dirty brake fluid: When water is mixed into or absorbed by the brake fluid, or if impurities or sediment are found in the brake fluid, it should be replaced or carefully filtered. Otherwise, it may lead to insufficient braking pressure, affecting braking performance.
I remember driving a Buick Verano a few years ago when the engine suddenly lost power—it felt like dragging a huge rock. The most common cause was thick carbon buildup in the throttle body, which restricted the engine's air intake and reduced power output. Other possibilities include worn-out spark plugs, where delayed ignition affects performance; a clogged fuel filter causing insufficient fuel supply and engine strain; or a blocked catalytic converter, where restricted exhaust flow impacts power. In my case, deep carbon deposits were the culprit, so I took it to the shop for a cleaning, and the power instantly returned. To prevent carbon buildup, it’s advisable to drive more on highways to avoid frequent stop-and-go city traffic, along with regular oil changes and maintenance to keep the car running smoothly.
In daily auto repair work, I've encountered many cases of insufficient power in the Buick Verano. For troubleshooting, first check the electronic throttle - carbon buildup can cause it to stick, reducing air intake. Next, inspect the ignition system; worn spark plugs or faulty ignition coils can lead to poor ignition efficiency. Also, test the fuel supply pressure, as clogged fuel pumps or injectors directly affect power output. Don't overlook sensor issues either - malfunctioning mass airflow sensors or oxygen sensors can mislead the ECU's adjustments. These problems can be conveniently diagnosed using an OBD scanner to read trouble codes. Identifying the root cause makes repairs much easier. I recommend not delaying maintenance to prevent minor issues from turning into major repairs.
