Engine Power Reduced Chevy Malibu [Cause, Solution, and Resetting Method]

The Chevy Malibu is a popular midsize sedan with an impressive track record for reliability and performance. Some Malibu owners have reported issues with reduced engine power, causing frustration and concern. In this article, we will dive into the common causes of engine power reduced Chevy Malibu and possible solutions to fix the problem. We’ll also explain how to reset your vehicle after addressing these issues to ensure your car runs smoothly again.

What Does Reduced Engine Power Mean in Chevy Malibu?

Engine Power Reduced Chevy Malibu [Cause, Solution, and Resetting Method]

Reduced engine power means that your car’s computer has detected a problem with the engine and has put it into “limp mode.” This is done to prevent further damage to the engine and other components. When in limp mode, your car will still run but at a reduced capacity, meaning it won’t accelerate as quickly or reach higher speeds. The warning message and an illuminated check engine light will typically appear on your dashboard.

Engine Power Reduced Chevy Malibu [07 Causes]

The Chevy Malibu is known for its performance and reliability on the road. One issue that many drivers have experienced is a reduction in engine power. This can be frustrating and potentially dangerous, especially when merging onto highways or passing other vehicles.

Engine Power Reduced Chevy Malibu [Cause, Solution, and Resetting Method]

Here are the 07 causes of reduced engine power from most common to least common:

Faulty Mass Airflow Sensor

The MAF sensor plays an important role in determining how much air enters your car’s engine. If it starts to malfunction, it can send inaccurate readings to your car’s computer system, resulting in reduced performance and stalling. This is particularly true if the MAF sensor fails to detect the right balance between fuel and air required for the engine’s smooth running.

Your airflow sensor works incorrectly because of the 04 issues.

  1. For faulty connections
  2. If the wires are open
  3. If the MAF sensor is dirty
  4. In an OBD-II scanner, you will see the P0130 code.

Faulty Throttle Body

Upon further inspection, it was found that a faulty throttle body caused the issue. The throttle body is responsible for regulating the engine’s airflow and helps control the car’s speed. 

The following 03 factors are responsible for a faulty throttle body:

  1. Loose connection
  2. Wrong ground connection
  3. Dirty throttle body, etc.

Faulty Spark Plugs

Faulty spark plugs are often the culprit behind engine power reduction in the Chevy Malibu. Over time, these components can wear out and become less effective at igniting fuel in the engine cylinders. Spark plugs not working correctly can lead to poor fuel economy and decreased acceleration performance.

Faulty Sensors

These sensors are responsible for communicating with the car’s computer to determine how much fuel and air should be delivered to the engine. When they malfunction, it can cause poor acceleration, difficulty starting, and other issues that can impact your vehicle’s performance.

You will also experience 04 symptoms when the oxygen sensor is faulty:

  1. Reduced gas mileage.
  2. Engine overall performance decreases.
  3. Check engine warning light appears.
  4. You will get the P0130 code in the OBD-2 scanner.

Faulty Fuel Pump

When the fuel pump is not working correctly, it can prevent the engine from receiving adequate gasoline. As a result, drivers may notice that their vehicle is struggling to accelerate or maintain speed on the highway. Drivers may experience stalling or difficulty starting their car altogether.

EGR Valve Issues

The EGR (Exhaust Gas Recirculation) valve is important in reducing harmful emissions from the exhaust system. It works by recirculating a portion of the exhaust gas back into the engine combustion chamber, where it can be burned again for a complete combustion process. Problems with the EGR valve can cause issues such as reduced engine power, stalling, and rough idling. 

Blown Fuse

When a fuse blows in your Malibu’sMalibu’s engine, it interrupts the flow of electricity that powers critical systems like fuel injection and ignition. As a result, your car’scar’s engine may not receive enough power to function properly. The good news is that replacing the blown fuse is often an easy fix. All you need to do is locate the faulty fuse and replace it with a new one with the same amperage rating.

Symptoms of Chevy Malibu Engine Power Reduced

If you own a Chevy Malibu, you may have experienced a reduction in engine power at some point. This can be a terrifying experience for any driver, especially while driving on the highway or in heavy traffic. Various car engine system issues usually cause engine power reductions.

Engine Power Reduced Chevy Malibu [Cause, Solution, and Resetting Method]

The symptoms are:

  1. The performance of the engine is reduced.
  2. Poor fuel economy.
  3. You will experience engine stalling or hesitating when accelerating your Chevy Malibu.
  4. The engine will misfire or vibrate.
  5. Increase emissions.
  6. Unusual noise from the engine, etc.

How to Reset Reduced Engine Power Light Chevy Malibu?

When this light appears on your dashboard, your engine is experiencing a problem and has been forced to go into “reduced power” mode as a safety precaution. This can be frustrating for drivers, especially if they don’t know how to reset the REP light. Luckily, resetting the REP light in your Chevy Malibu is relatively easy.

  • Turn off the engine and remove the key from the ignition. 
  • Wait for at least 30 seconds before restarting the engine. 
  • Check and clean both the air filter and throttle body.
  • Restart your car and see if the light goes away.
  • If it doesn’t, then you’ll need to reset it manually.
  • Start by disconnecting the battery cables from their terminals and waiting about 15 minutes before reconnecting them.

If the warning light doesn’t reset or reappears, it is a major issue and requires proper checking.

In this case, you have 03 options available to resolve reduced engine power mode:

  1. Check all the parts causing the warning light to come on.
  2. Use an OBD-II scanner and find out the faulty parts.
  3. Take the vehicle to an experienced mechanic.

The OBD-II scanner generates the following codes

  • P0101 (MAF sensor issues)
  • P1101 (Intake airflow system issues)
  • P0172 (More fuel and low air in the engine combustion chamber)
  • P0506 (Lower RPM than it should)
  • P0299 (Supercharger or Turbo “A” has low output)

By diagnosing, you can find the specific faulty parts easily.

  • Check the cables
  • Check all engine-related sensors
  • Inspect the throttle body
  • Inspect the mass airflow (MAF) sensor
  • Check the transmission fluid level and quality
  • Inspect your Malibu’sMalibu’s battery
  • Inspect the electric control unit or ECU properly
  • Inspect the fuel pump.

Once you’ve finished the complete inspection, you can identify defective parts.

How to Avoid Chevy Malibu Reduced Engine Power?

To avoid Chevy Malibu’sMalibu’s reduced engine power issues, keeping up with the car’scar’s regular maintenance schedule is important. Regular oil changes, tune-ups, and air filter replacements can help keep the engine running smoothly. Drivers should pay attention to any warning lights or messages on the dashboard that indicate an issue with the vehicle’svehicle’s performance.

If you own Duramax and facing reduecd engine power reset also read this article.


The engine power reduced Chevy Malibu can be caused by various factors, such as a faulty throttle body, wiring issues, or even low battery voltage. There are solutions to rectify the problem, like cleaning or replacing the throttle body, checking and repairing any damaged wires or connectors, and charging the battery. Resetting the system by disconnecting the battery for at least 30 minutes is also effective. It is important to regularly maintain your vehicle and pay attention to any warning signs to prevent such issues from occurring in the first place. 


Will an oil change fix reduced engine power?

An oil change is not a cure for reduced engine power, but it can help improve your engine’s performance.

What happens when engine power is reduced?

When engine power is reduced, the car will move slowly and erratically. The driver may be unable to control the car, and it may crash.

Why does my 2017 Chevy Malibu say engine power is reduced?

One possible reason for reduced engine power is that the 2017 Chevy Malibu has a new 2.4L I-4 engine. This engine produces less power than the previous engine and may sometimes be responsible for reduced engine power.

Can low oil cause reduced engine power?

This question has no definitive answer as it depends on various factors, including the engine specific design and function. Low oil levels may reduce engine power, particularly if the engine runs on lower compression ratios.

Can I drive with engine power reduced?

Yes, you can drive with engine power reduced by using a Vehicle Control Unit (VCU) to switch between engine and battery power.

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