Engine Power Is Reduced Chevy Cruze: Causes & Solutions

In the Chevy Cruze, one of the most common problems is that the vehicle loses power, resulting in a dashboard message that reads “engine power is reduced.”

Engine Power is Reduced Chevy Cruze Causes & Solutions

This problem has been experienced by a few Chevrolet Cruzes in my workshop. We’re going to take a look at what causes a Chevy Cruze’s engine power to be reduced in this article.

What Does It Mean When Engine Power is Reduced Chevy Cruze?

Your Chevy Cruze is sending you an engine power is reduced message, indicating that the ECU has detected an issue and is limiting engine power in order to prevent further damage.

Most often, the problem is caused by a faulty accelerator pedal sensor or a defective throttle body.

Why does Chevy Cruze’s “Engine Power is Reduced” fault occur?

I have trimmed down the causes of this error from my experience after working on a few Chevy Cruzes:

Defective accelerator pedal sensor

When the engine power on a Chevy Cruze is reduced, the most common cause is a faulty accelerator pedal sensor. Accelerator pedal sensors are as their name suggests located on the pedal.

In my vehicle’s electronic throttle control system, the accelerator pedal sensor plays a key role. It sends signals to the car’s computer based on how far I press the gas pedal.

Defective accelerator pedal sensor

In order for the engine to respond precisely to your speed requirements, the computer determines how much fuel to supply the engine with.

It is possible to experience inconsistent engine response, diminished fuel efficiency, or messages stating “engine power is reduced” if the accelerator pedal sensor is faulty.

Throttle body failure

On a Chevy Cruze, “engine power is reduced” is often caused by the throttle body. As part of the air intake system of an engine, the throttle body plays a crucial role.

Throttle body failure

To regulate the amount of air entering the engine, a valve (butterfly) is rotated in a tube-shaped housing.

The throttle body controls airflow through traditional spark ignition gasoline engines based on the gas pedal input.

Possible causes include

Having talked about the main causes for a Chevy Cruze’s “Engine power is reduced” message, I can confidently say one of these two causes is responsible 90-95% of the time.

In spite of this, there are still some other potential causes.

Battery failure

When your Cruze’s battery is dead, the throttle and other electronics can malfunction.

The engine control unit (ECU) and other electronics in your car may not receive enough current if your battery is not charging properly. As a result, your engine would produce less power.

DPF clogs on Diesel Engines

Over time, soot and other particulates produced by the diesel Chevy Cruze engines can clog the Diesel Particulate Filter. Consequently, your Cruze can run poorly, and the “Engine Power is Reduced” message will appear.

What to do if your Cruze’s engine power has been reduced?

Getting an OBD2 scanner and scanning the vehicle should be your first step. This will provide you with a clear picture of the problem.

When you get P2138/2128 codes, you need to replace the brake pedal sensor. In the event that you receive any throttle-related codes, you will need to replace the throttle body.

What to do if your Cruze's engine power has been reduced

Your chevy can be scanned by any technician or dealership if you don’t own an OBD2 scanner. In addition, they will be able to pinpoint if you have a throttle-related code, or a brake pedal sensor code.

Read here Where Are The Chevy Truck Ground Locations?
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Frequently Asked Questions

Is it safe to drive with reduced engine power?

If driving slowly is absolutely necessary, you may be able to do so. Driving your vehicle in reduced engine power mode will only result in low speeds and minimal performance, making driving itself dangerous.

Why does my car say engine power is reduced?

An engine control module (ECM) protects the engine by reducing engine power, which is a failsafe mode. The limp mode can be triggered by many things, including loose cables, low liquid levels, transmission errors, and failing sensors in the engine.

What causes reduced engine power Chevy Cruze?

Your battery’s connection is faulty, which is the most common problem. Sometimes it happens once and sometimes it happens multiple times. To resolve this, I recommend that you get it serviced as soon as possible, and that they check your battery because if it is the battery, a new one is the only solution.

What are the common signs of engine power reduction in Chevy Cruze?

Dashboard warning lights should be illuminated if acceleration is sluggish or top speed is reduced.

Can I fix engine power reduction issues on my own?

It is possible to fix some minor problems yourself, such as replacing spark plugs and cleaning air filters. Professional intervention may be required for more complex problems.

How often should I schedule maintenance check-ups for my Chevy Cruze?

In most cases, manufacturers recommend scheduling periodic maintenance check-ups between 6,000 and 8,000 miles, depending on the vehicle.

Are engine power reduction issues covered under warranty?

It may be possible to cover certain engine-related issues depending on the warranty terms. Be sure to check the warranty documentation for your vehicle.

Can aggressive driving habits really impact engine power?

It is true that aggressive driving can lead to greater engine wear and tear, potentially resulting in a reduction in power. Longer engine life can be achieved by driving more moderately.


Maintaining optimal performance of Chevy Cruze vehicles requires understanding and addressing engine power reduction. You can make your Chevy Cruze ride smoother by fixing it yourself, using professional solutions, or taking preventive measures.

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