What is the Chevy Malibu engine power reduced lawsuit?

The short answer is that it refers to a set of lawsuits alleging that some Chevrolet Malibu models can unexpectedly drop engine power, sometimes displaying an "Engine Power Reduced" warning, due to a defect in the powertrain or its control software. These cases claim the issue is underreported or not adequately fixed by the manufacturer, and plaintiffs seek remedies such as recalls, repairs, or compensation. The legal landscape is evolving, with cases filed across various courts and ongoing discussions about whether the issue is systemic or limited to certain model years and configurations.

What the lawsuits allege

Below are the core elements commonly raised in these complaints, illustrating the scope of the allegations and the remedies plaintiffs are pursuing.

• Alleged defect: Plaintiffs claim certain Malibu powertrains contain faults in engine management software or related components (such as the throttle system or sensors) that trigger a reduced-power mode under driving conditions, diminishing acceleration and overall performance.


• Symptoms and safety concerns: Vehicles may intermittently display an "Engine Power Reduced" warning and enter a lower-power state, with the risk of reduced ability to merge or accelerate in traffic.


• Remedies sought: Plaintiffs typically request recalls or free repairs, reimbursement for out-of-pocket repair costs, compensation for depreciation or diminished resale value, and, in some cases, certification of a class action.

These suits are being pursued in multiple jurisdictions and involve variations by model year and specific vehicle configurations. Outcomes depend on evidence about whether the defect is widespread and whether GM concealed information or failed to disclose a known risk.

Background and status of the cases

Context around the Malibu model years most often cited includes vehicles from the mid-2010s to early- to mid-2020s. Plaintiffs argue that a systemic defect affects power delivery, while General Motors contends that reported incidents do not establish a single, controllable defect across all Malibu models and that any remedy should be handled through appropriate service campaigns or recalls when warranted. The lawsuits’ status varies by case and jurisdiction, with some moving toward discovery, potential mediation, or dismissal in certain instances. Always check the latest docket information for current developments.

What Malibu owners can do

If you own a Chevrolet Malibu and have experienced engine power loss or warning messages, consider the following steps to protect your rights and stay informed about potential legal remedies.

1. Check for recalls or service campaigns using your vehicle’s VIN on the NHTSA recall database or GM’s official recall site.


2. Document every incident: date, time, location, driving conditions, any dash warnings (like "Engine Power Reduced"), and whether power restored after restarting the car.


3. Have a qualified mechanic diagnose the issue, including checks of the powertrain control module, throttle system, sensors, and related software versions; request written reports of findings.


4. Consider consulting a consumer-rights attorney if you believe you may be affected by a defect that could be part of a class action or separate claim; collect repair receipts and communications with dealers.


5. Monitor official notices and court announcements related to Malibu-related engine-power lawsuits, as outcomes and available remedies can evolve over time.

Taking these steps helps you document potential issues and understand available remedies, though it does not guarantee eligibility in any specific lawsuit.

Summary

In summary, the Chevy Malibu engine power reduced lawsuits focus on claims that certain Malibu models can unexpectedly enter a low-power state with warnings like "Engine Power Reduced" due to a defect in the powertrain system or its software. The cases are ongoing and differ by model year and jurisdiction, with plaintiffs seeking recalls, repairs, and compensation. Owners should stay informed via recall databases, maintain thorough documentation, and consult legal guidance if they believe they have a compensable claim.

For the latest developments, rely on court records, consumer protection agencies, and GM’s official notices. This issue remains under active review as manufacturers and courts assess the scope and remedies tied to any alleged defect.

What is the class action lawsuit on the Chevy Malibu?

Several class action lawsuits have been filed against General Motors regarding the Chevy Malibu, primarily concerning a "shift to park" defect and issues with electronic throttle controls and brake systems. The "shift to park" issue affects certain models from 2016-2019, and a settlement has been reached for these cases. Another lawsuit alleges a defective cam-driven brake vacuum pump in 2013-2022 models, which can cause a loss of braking capability. A separate lawsuit focused on 2016-2018 models alleged defective electronic throttle controls that could cause unexpected power loss. 
"Shift to Park" Defect 

• What it is: A defect where the vehicle fails to recognize when it has been shifted into "park".
• Affected models: Certain 2016-2019 Chevrolet Malibu, GMC Acadia, Chevrolet Blazer, Chevrolet Traverse, and Chevrolet Volt vehicles.
• Status: A class action settlement was reached. The court-authorized settlement website is STPLawsuit.com. 

Brake System Defect

• What it is: A defective cam-driven brake vacuum pump that can cause a loss of braking capability and increase stopping distances.
• Affected models: Model year 2013-2022 Chevrolet Malibus with 1.5L, 1.8L, 2.0L, and 2.5L engines.
• Status: A class action lawsuit was filed alleging GM failed to correct the defect even after acknowledging it in a technical service bulletin. 

Electronic Throttle Control Defect 

• What it is: Defective electronic throttle controls and/or accelerator pedal position sensors that can cause a sudden loss of power while driving.
• Affected models: 2016-2018 Chevrolet Malibu vehicles.
• Status: Lawsuits were filed, and some owners may have received extended warranties on the faulty sensors. 

How to get involved in a class action lawsuit

• Check eligibility: Visit the class action settlement website (if available) to see if your vehicle and situation qualify.
• Gather documents: Collect all relevant paperwork, such as purchase receipts and repair records.
• Contact the law firm: Find the law firm that is handling the lawsuit and fill out their online form to join the case. 

Is there a recall on the Chevy Malibu reduced engine power?

Yes, there have been recalls and service bulletins for Chevy Malibu models related to reduced engine power. A 2019 recall addressed a software defect in some 2018 models that could disable fuel injectors, while earlier issues involved calibration errors in the engine control module (ECM). Separate from recalls, a common cause of this symptom in other model years is a disconnected Charge Air Cooler (CAC) outlet tube, faulty sensors, or a dirty throttle body.
 
Recalls and bulletins
This video explains the recall and other issues related to reduced engine power in Chevy Malibu: 59sSimple Mechanic AdviceYouTube · Nov 4, 2024

• 2019 Recall (NHTSA Campaign 19V642000): This recall affected approximately 177,300 model-year 2018 Malibus with a 1.5-liter turbocharged engine. A software error in the ECM could disable the fuel injectors, leading to a sudden loss of power or a no-start condition. The fix was a free ECM reprogramming. 
• 2015 Recall (NHTSA Campaign 15V164): This recall addressed an ECM calibration error in 2013–2015 Malibu models that could trigger a "limp-home mode" and the "Engine Power Reduced" warning. Dealers reprogrammed the ECM to fix the issue. 
• Technical Service Bulletins (TSBs): For various models, GM issued TSBs (like 18-NA-072 and 20-NA-212) to help technicians diagnose and repair issues, particularly those involving the accelerator pedal position sensor or a separated Charge Air Cooler (CAC) outlet tube. 

Other potential causes and fixes

• Separated CAC outlet tube: In some 2018-2022 models, the CAC outlet tube can separate from the throttle body, causing reduced engine power and setting related diagnostic trouble codes. A GM technician can inspect and reattach the tube. 
• Faulty accelerator pedal position sensor: For 2016-2018 models, a defective accelerator pedal position sensor has been a common issue, sometimes leading to a class-action lawsuit. A fix may involve replacing the faulty sensor, often at no cost to the owner if the vehicle is covered by a related extended warranty program. 
• Dirty throttle body: A buildup of debris on the throttle body can prevent proper airflow, leading to the reduced power warning. Cleaning the throttle body is a potential fix. 
• Other potential issues: Other factors can also cause this warning, including other faulty sensors, vacuum leaks, or transmission problems. 

What to do if you get the "Engine Power Reduced" message

• Get the diagnostic codes read: Visit an auto parts store for a free reading or take it to a trusted mechanic to get the specific trouble codes (DTCs). 
• Check for open recalls: Use your vehicle identification number (VIN) on the NHTSA website to see if there are any outstanding recalls for your Malibu. 
• Consult a mechanic: Based on the diagnostic codes, a mechanic can properly diagnose the problem and perform the necessary repairs, which may include software updates, sensor replacements, or cleaning the throttle body. 

Why does my Chevy Malibu keep saying engine power reduced?

The "engine power reduced" message on a Chevy Malibu indicates that the vehicle's computer has detected a problem and is limiting performance to prevent engine damage. This "limp mode" can be caused by issues with the throttle body, sensors (like the accelerator pedal position sensor or mass airflow sensor), electrical wiring, or the fuel system. A common specific problem for some Malibu models is a separating charge air cooler outlet tube. 
This video explains why the "engine power reduced" warning appears on Chevy Malibu and how to fix it: 59sTopicMotorYouTube · Jan 25, 2025
Common causes

• Throttle body issues: A dirty or malfunctioning throttle body is a very common cause, as it can restrict the amount of air entering the engine. 
• Sensor faults: Faulty sensors, particularly the accelerator pedal position sensor (APP) or throttle position sensor (TPS), can send incorrect signals to the computer. A 2018-2022 model year issue involves a separating charge air cooler outlet tube that can cause a variety of related sensor codes. 
• Electrical problems: Issues with wiring, such as loose connections or corrosion, can interrupt the signals between components. 
• Fuel system problems: A weak fuel pump, clogged injectors, or clogged fuel filters can starve the engine of necessary fuel, triggering the warning. 
• Other electrical and control systems: Problems with the electronic throttle control system, mass airflow sensor, or other related modules can also cause this message. 

What to do

• Do not ignore the warning: While you may be able to drive the vehicle slowly, the purpose of this mode is to protect the engine from further damage. 
• Get the codes read: Take the car to an auto parts store or mechanic to have the diagnostic trouble codes (DTCs) read with an OBD-II scanner. This will provide specific information on the problem. 
• Consult a professional: The issue should be diagnosed and repaired by a qualified mechanic. For model years 2018-2022 with the 1.5L turbo engine, a GM technician should inspect the charge air cooler outlet tube connection to the throttle body. 

You can watch this video to learn how to diagnose and fix the "engine power reduced" warning on a Chevy Malibu: 57sSimple Mechanic AdviceYouTube · Nov 4, 2024

What is the lawsuit for the engine power reduced Chevy Malibu?

Chevy Malibu owners have sued General Motors (GM) over the Chevy Malibu 'engine power reduced' issue—arguing that GM was aware of the defects but chose not to recall the affected vehicles. General Motors (GM) responded with service bulletins but did not initiate a full recall.