Understanding Engine Power Reduced And How To Fix It

engine power reduced

There’s nothing worse than being a car owner and having unanticipated problems crop up. The loss of engine power is an issue that automobile owners often encounter. When this occurs, the engine’s performance suffers significantly, which may be annoying and even hazardous. If you drive a Chevrolet, GMC, or Buick, you may be familiar with the “Engine Power Reduced” warning. If you’re seeing this message, there’s obviously an issue with your engine that requires fixing right away. Here are the causes and solutions to your Chevy Malibu, equinox, or other vehicle’s engine power reduction.

What Is Engine Power Reduced? 

When the vehicle’s engine experiences a significant decrease in power output, it can negatively affect the car’s performance and increase the risk of accidents. The car’s computer system detects any engine problems and activates the “Engine Power Reduced” warning light as a precautionary measure. This warning light is designed to mitigate the impact of potential mechanical failures that could affect the engine. 

What Causes Engine Power Reduced? 

Several factors might cause your car engine power reduced. Some of the most frequent reasons include the following: 

Sensor Failure 

A malfunctioning sensor might lower engine output. The engine in your automobile depends on several sensors, and problems might arise if even one of them is malfunctioning. A malfunctioning oxygen sensor, or crankshaft position sensor, for instance, might lead the engine to run rich, which can reduce performance. 

Burnt Wires 

Faulty wiring can also cause a loss of engine power. The wiring in your automobile connects multiple parts, and if any of those connections break, it can impact how well the engine performs. For example, damaged wiring might cause faulty fuel injectors, which could reduce engine output. 

Fuel System Issues 

Reduced engine power is another symptom of problems with the fuel system. A drop in fuel pressure, which a malfunctioning fuel pump may cause, can negatively impact the motor’s efficiency. A blocked gasoline filter may have the same effect on an engine. 

Low-Quality Air Filter 

A filthy air filter might be the cause. 

The air filter cleans the air before the engine sucks it in, preventing harmful particles from entering. Reduced output is possible if the air filter is clogged with debris also, check your oil pressure sensor. 

Issues with the Stabilitrak System 

The “Service StabiliTrak” warning may appear with the “Engine Power Reduced” sign on Chevrolet Malibu, Chevrolet Equinox, and Buick vehicles. There seems to be an issue with the vehicle’s stability control system, which might reduce engine output. If you notice a Stabilitrak engine power is reduced, it is important to carefully examine your vehicle to solve the problem or contact the specialist. 

How to Fix Engine Power Reduced? 

The first step in fixing engine power-reduced light is pinpointing what’s causing it. It may be as easy as tightening the gas cap or changing the air filter, or it could be more involved, like replacing a faulty sensor or rewiring the vehicle. You can increase your engine’s efficiency by fixing the camshaft position sensor.  

If your car engine power is reduced, try these solutions: 

Test the Gas Cap 

Loss of engine power might result from faulty or loose gas caps or O2 sensor problems. Make sure you securely fasten your gas cap and replace it if it is broken. 

Poorly Functioning APP Sensor 

The electronic control unit (ECU) receives a signal from the APP whenever the accelerator is depressed. The engine’s performance, notably the engine’s power output, might suffer from a defective APP sensor. Possible replacement of malfunctioning APP sensor. 

Troubles with the Gasoline Supply 

The engine power of a Chevrolet Malibu or Equinox might drop if there are problems with the fuel system, such as a clogged fuel filter or a broken fuel pump. The efficiency of the engine might suffer if the fuel system is malfunctioning. It could be essential to inspect and repair the gasoline system. 

Dirty Air Filter 

Reduced power results from a filthy air filter that prevents fresh air from reaching the engine. Changing the filter may solve the problem. 

Throttle Position Sensor (TPS) Issues 

The engine control module receives a signal from the throttle position sensor (TPS) based on the driver’s input regarding the throttle’s location. Reduced engine output is only one of the concerns that might arise from malfunctioning or incorrectly adjusted TPS. It may be necessary to replace or re-adjust a TPS that is malfunctioning. 


How To Reset Engine Power Reduced? 

To reset the low engine power indicator light, you should turn off the ignition, wait for 10 seconds, and then turn it back on again. If your car’s engine power indicator is flashing, you shouldn’t get behind the wheel until you figure out what’s causing the problem. 

Why does my car say engine power reduced? 

The engine power warning light illuminates when fuel and air flow are restricted. It doesn’t always signal your car is ready to break down if the maintenance light comes on; it might just be a good time for an oil change. 

Why is my engine power reduced? 

A malfunction with the steering rack, the wheel speed sensors, the steering angle sensors, or the rotational speed sensors might all contribute to the dashboard warning light coming on. 

Is it safe to drive with reduced engine power? 

It is safe to drive with the engine power signal set to a minimum. However, that is not recommended. It may lead to sluggish acceleration, awkward gear changes, and worse gas economy. Too little or too much fuel may cause serious problems for an automobile’s engine.   

How to bypass reduced engine power? 

There are a few common causes of a weak engine, including low oil, loose wiring, and a clogged catalytic converter. You can avoid it by securing loose wires or cleaning oxygen and mass air flow sensors. If your battery or catalytic converter is broken, you may restore full engine power by replacing them. 


You may face engine power-reduced issues in your vehicle for several reasons. You can keep your car in good working order and prevent any unwanted breakdowns by learning to identify and address the most frequent reasons for a loss of engine power. Look for a qualified technician if you need help figuring out what’s wrong or how to repair it.

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