Engine Power Is Reduced Chevy Malibu: Affected Models and Recalls

You are merging onto the interstate. Foot down, engine winding up, and then nothing. The pedal goes soft. The dash lights up with “Engine Power Is Reduced,” your speed bleeds off toward 20 mph, and the semi behind you gets a lot closer than you would like.

Your Malibu is not being dramatic. It is doing what GM programmed it to do. Somewhere in the throttle system, a sensor sent a number the computer refused to trust, and the safest response the engineers could think of was to take the power away and let you coast to the shoulder. Sensible on a whiteboard. Terrifying at 70 mph with a trailer in your mirror.

Below is what actually causes this, which repairs GM still pays for in 2026, and what to do when the dealership keeps handing the car back with the same problem.

What Engine Power Reduced Means on a Chevy Malibu

“Engine Power Is Reduced” is a Driver Information Center message telling you the engine control module has entered a protective throttle-limiting state, often called limp mode. The module caps throttle opening, torque, and top speed so you can reach a safe place. The check engine light almost always comes on with it.

Every modern Malibu uses electronic throttle control. No cable runs from your foot to the engine. Two independent position sensors inside the accelerator pedal assembly report where your foot is, the module compares those two signals against each other, and a small motor on the throttle body opens the throttle plate to match. Redundancy is the entire point of the design. When the two signals disagree, or when the airflow data stops making sense, the module has no safe way to know what you are asking for. So it stops guessing.

How This Differs From “Reduced Acceleration, Drive With Care”

Newer GM trucks and SUVs, including the Silverado, Colorado, and Yukon, display “Reduced Acceleration, Drive With Care.” The Malibu uses “Engine Power Is Reduced,” or a shortened “Reduced Power” on some clusters. Same underlying strategy, different wording, different vehicles. If you searched the truck phrasing and landed here, the diagnostic logic still applies. The Malibu-specific coverage programs below will not.

Symptoms That Show Up Alongside the Message

• A pedal that feels dead past roughly a third of its travel
• Top speed capped somewhere between 20 and 40 mph
• Check engine light, also called the Malfunction Indicator Lamp
• “Service StabiliTrak” or “Service Traction” on the same screen, because stability control shares throttle authority with the engine module
• Rough idle, or a stall when you come to a stop, which points hard at cause 2 below
• A loud pop from under the hood a second before the power drops, which is close to a diagnosis on its own

Can You Drive a Malibu With Engine Power Reduced

Drive it to the nearest safe stopping point and no further. Limp mode is a get-off-the-road mode, not a commute mode. You cannot merge, you cannot pass, and on the 1.5L turbo cars the same fault that triggers the message can stall the engine at idle.

If it happened once on the highway and cleared after a restart, treat that as a warning shot. It will happen again. The second time may not be in light traffic.

The Five Causes That Explain Almost Every Case

1. Accelerator Pedal Position Sensor Circuit, Code P2138

GM describes the condition in its own bulletin: a condition affects the electrical connection to one of the accelerator pedal position sensors. The pedal keeps working, but the car enters reduced engine power mode, the check engine light comes on, the “Engine Power Is Reduced” message displays, and the module stores P2138, Accelerator Pedal Position Sensor Correlation.

On Malibus with the 1.5L LFV engine, GM traced part of the problem to the engine wire harness rubbing against the heater inlet hose clamp. The harness chafes, continuity drops out, the module sees two pedal sensors disagreeing, and it cuts power. This is the single most common trigger on 2016 through 2018 cars, and it is the one GM agreed to pay for.

2. Charge Air Cooler Outlet Tube Blowing Off the Throttle Body

On turbocharged Malibus, a large duct carries pressurized air from the intercooler to the throttle body. The factory retainer is not always strong enough to hold it under boost. It lets go, usually with an audible pop, and the engine suddenly inhales a huge volume of air the mass airflow sensor never measured.

The module sets one or more of P0172, P0299, P0101, P1101, and P0506, drops the car into reduced power, and the engine may run rough or stall at idle. GM preliminary bulletin PIP5651F, published August 2021, lists 2018 through 2022 Malibus with the 1.5L LFV and those exact five codes. Bulletin 22-NA-224 from November 2022 replaced it.

The good news: this is the cheapest failure on the list. Often the tube just needs to be reseated and secured with the updated retainer, GM part number 13434668.

3. ECM Software That Disabled the Fuel Injectors, 2018 Models Only

GM recalled 177,282 model year 2018 Malibus with the 1.5L turbo engine under NHTSA campaign 19V642000. An error in the engine control module software could disable the fuel injectors, which prevents the engine from starting and can cause a stall in motion. The remedy is a free ECM reprogram, and it opened October 16, 2019.

4. Throttle Body Contamination and Throttle Actuator Control Faults

Carbon and oil film build up on the throttle plate and bore over tens of thousands of miles. The plate binds, the throttle actuator control motor cannot hit its commanded position, and the module reads the mismatch as a fault. A cleaning and a throttle relearn fix most of these. Replacing the throttle body outright is often unnecessary, and bulletin 22-NA-224 says as much, telling technicians not to swap the throttle body or MAF sensor unless they are damaged or proven to be the cause. Show that sentence to any shop quoting you a throttle body on a hunch.

5. Wiring, Grounds, and Supporting Sensors

Everything else lands here. A mass airflow or manifold pressure sensor sending drifting data. A corroded ground strap. Low system voltage during stop-start cycling on a tired battery. A clogged PCV orifice in the valve cover raising crankcase pressure, which can also set P1101 on the 1.5L. These are less common than the first two causes, and they are the reason a scan comes before a parts order.

A Correction to the Story Most Malibu Articles Tell

Two claims circulate across most of the top-ranking pages on this topic. Neither one survives a check against the primary documents.

Claim one: GM recalled more than 300,000 Malibus from 2013 to 2015 to fix a software calibration that falsely triggered reduced engine power. The campaign those articles point to is NHTSA 15V164. Pull GM Recall Bulletin 15176A, the actual document behind that campaign, and the subject line reads “Sunroof Switch Compliance.” It covers 2013 to 2015 Malibus built with the power roof panel option; it was a Federal Motor Vehicle Safety Standard 118 noncompliance, and the remedy was a body control module reflash plus a sunroof motor relearn. Nothing in it touches the engine, the throttle, or the powertrain.

Claim two: TSB 18-NA-072 covers reduced engine power on the Malibu. It does not. That April 2018 bulletin applies to E85-capable vehicles with code P228C, and its model list runs Buick LaCrosse, Regal, and Verano, Cadillac ATS and SRX, Chevrolet Caprice PPV, Captiva, Equinox, and Impala, and GMC Terrain. The Malibu appears nowhere on it.

This matters for a practical reason. Walk into a service department asking for a recall that does not exist and you get told no, and you go home with the same car. Ask for the programs that do exist, by campaign number, and you get the repair.

Which Malibu Years Are Affected, and by What

Note on the 2016 to 2018 rows: the same special coverage also applies to the 2017 and 2018 Buick LaCrosse and the 2018 Buick Regal, which share the component.

Every GM Program That Pays for This Repair

Special Coverage Adjustment N182188250

This is the important one for most Malibu owners reading this page.

• Covers 2016 to 2018 Chevrolet Malibu, 2017 to 2018 Buick LaCrosse, and 2018 Buick Regal
• Condition: the electrical connection to one accelerator pedal position sensor is interrupted, the car enters reduced engine power mode, the MIL illuminates, “Engine Power Is Reduced” displays, and P2138 sets
• Repair: Dealers replace the accelerator pedal and position sensor assembly as needed, and repair the engine wire harness on Malibu LFV cars
• Term: 10 years or 150,000 miles, whichever comes first, from the date the vehicle was originally placed in service, regardless of ownership
• Cost to you: none

Safety Recall 19V642000, GM number N192221960

2018 Malibus with the 1.5L turbo, built April 25, 2017 through September 20, 2018. 177,282 vehicles. Disabled fuel injectors prevent the engine from starting and can cause a stall while driving. Free ECM reprogram, available since October 16, 2019. Safety recalls do not expire, so if the work was never performed on your VIN, the dealer still owes it to you at no charge.

Emissions Recall N192271200 and Service Update N192266090

2019 Malibu, Equinox, and Terrain with the 1.5L engine. The charge air cooler outlet duct can disconnect from the throttle body under boost, which displays reduced engine power, roughs the idle, illuminates the MIL, and can stall the car at low speed. Dealers install an improved charge air cooler retainer. N192266090 was an inventory-only service update that expired September 30, 2020. N192271200 is the customer-facing emissions recall.

Technician Bulletins 22-NA-224 and PIP5651F

These are not customer programs, and no dealer will hand you a free repair because you named them. They still change the conversation. PIP5651F tells technicians to confirm the charge air cooler tube connection at the throttle body before diagnosing anything else. 22-NA-224 adds reference photos separating normal scuff marks on a throttle body from real damage, and instructs technicians not to replace parts that are merely scuffed. Quoting a bulletin number at the service desk signals you will read the repair order carefully.

How to Check Your Own VIN in Four Minutes

1. Find the 17-character VIN at the base of the windshield on the driver side, or on the doorjamb sticker.
2. Run it at nhtsa.gov/recalls for open safety recalls. Emissions recalls and special coverages do not always appear there.
3. Sign in to your Chevrolet owner account and open the warranty section. Special Coverage N182188250 shows up there by number when it applies to your car.
4. Call a Chevrolet service department and ask them to check Investigate Vehicle History for your VIN. That is the internal system where special coverages and open campaigns live. Ask for the result in writing.

What to Say at the Service Desk

Ask for a copy of the repair order before you leave. Every time, including visits where they find nothing. That paper is the foundation of any warranty claim later, and a “no problem found” order still counts as a repair attempt.

How to Diagnose It Before You Pay Anyone

1. Scan for codes. A basic OBD-II reader is enough. Write down every code, including pending ones, plus the mileage and the date.
2. On turbo cars, open the hood and look at the wide black duct running from the intercooler to the metal throttle body. If it is loose or lying against the engine, you just found your problem for free.
3. On 2016 to 2018 cars, follow the engine wiring near the heater inlet hose and look for chafe marks against the hose clamp. GM calls out that exact spot in N182188250.
4. Note the pattern. Under hard acceleration, at idle, in cold weather, after a car wash. Intermittent faults are won and lost on pattern notes.
5. Do not clear the codes before a technician sees them. Freeze frame data is evidence, and erasing it hands a service writer an easy “no problem found.”
6. Then decide who should pay, using the model year table above.

The Cost When Nobody Else Pays

Prices move with your market and your model year. Treat these as a sanity check against a quote, not a promise.

Resetting the Message, and Why the Reset Is a Trap

A lot of people search for how to turn this message off. Here is the honest answer.

It clears three ways. On its own after an ignition cycle, if the fault does not repeat. With a scan tool that erases the stored codes. By disconnecting the battery for about 15 minutes, which also wipes your radio presets, your throttle relearn, and the freeze frame data a technician needs.

None of those repair anything. The module set the code because a real input failed. Clear it and the car drives normally until the same sensor drops out again, which on a chafed pedal harness might be tomorrow or three months from now.

Clearing codes also costs you leverage. Warranty claims are built on documented repair attempts. A driver who reset the message eleven times has a story. A driver with four repair orders, each listing the same code, has a case.

The Class Actions, and Why They Will Not Send You a Check

Two class actions targeted this exact defect.

Hutchinson v. General Motors LLC, No. 8:19-cv-01551 in the U.S. District Court for the District of Maryland, was filed in 2019 for 2016 to 2018 Malibu owners. The complaint alleged a defective electronic throttle control and accelerator pedal position sensor that dropped vehicles to roughly 20 mph at highway speed.

Rothschild v. General Motors LLC, No. 1:19-cv-05240 in the Eastern District of New York, followed later that year with a proposed nationwide class of 2016 to 2018 Malibu buyers and lessees. Judge Dora L. Irizarry dismissed it in 2020.

No nationwide settlement fund exists for Malibu reduced engine power. Nobody is mailing you a claim form. Most articles skip that part, and it is the part that changes what you should do next. Your leverage here is individual, and it runs through your warranty.

When Repeated Power Loss Becomes a Legal Claim

GM ended Malibu production in November 2024 at the Fairfax Assembly plant in Kansas, after nine generations. Every Malibu on the road today is a used car, and most sit outside the original 3-year or 36,000-mile bumper-to-bumper coverage. That shifts the analysis. It does not end it.

The Federal Route, the Magnuson-Moss Warranty Act

The Magnuson-Moss Warranty Act is a federal law that lets consumers enforce written and implied warranties on consumer products, vehicles included, in any state. A special coverage adjustment like N182188250 is a written warranty extension. If GM promised to fix the pedal sensor circuit for 10 years or 150,000 miles and your car came back with the same fault after repeated attempts, that promise is enforceable. The statute also lets a prevailing consumer recover attorney fees from the manufacturer, which is why warranty firms take these cases with nothing paid up front.

The California Route, the Song-Beverly Act

California’s Song-Beverly Consumer Warranty Act, at Civil Code sections 1790 through 1795.8, carries the strongest buyback rights in the country. A refund of what you paid, less an offset for the miles you drove before the problem started, or a replacement vehicle, when a manufacturer cannot fix a substantial defect in a reasonable number of attempts. A defect that drops your car to 20 mph on a freeway is about as substantial as defects get.

The procedure changed recently. Assembly Bill 1755, signed September 29, 2024, and its cleanup bill SB 26 rewrote how these claims are filed. Most provisions took effect January 1, 2025, and the pre-suit notice rules became operative July 1, 2025. Where a manufacturer has opted into the new track, you must send written notice at least 30 days before filing suit. The substantive protections did not shrink. The deadlines and steps changed, and missing one is expensive.

Rules differ by state. Compare your own at Lemon My Vehicle’s state lemon law guides, or start with the California lemon law page.

The Paperwork That Decides It

• Every repair order, including the visits where they found nothing. Those still count as attempts.
• The date and mileage of each visit
• The codes recorded each time
• Your purchase or lease contract
• Rental and loaner receipts, plus total days out of service
• Any letter GM sent about N182188250, and any receipt if you paid out of pocket
• A timestamped photo or short video of the dash message. Hard to argue with.

Not sure whether your repair history clears the bar? Send us your documents and our team will review them at no cost. You can also read more about Chevrolet lemon law claims or browse related GM engine defect coverage in our GM 6.2L L87 engine lawsuit article.

Frequently Asked Questions

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

Not a single general recall. GM issued Special Coverage Adjustment N182188250 for 2016 to 2018 Malibus with the accelerator pedal position sensor circuit fault, Safety Recall 19V642000 for 2018 turbo models with an ECM software defect, and Emissions Recall N192271200 for 2019 models with the charge air cooler retainer. No safety recall covers reduced engine power on 2013 to 2015 Malibus.

How do I turn off the engine power reduced message on my Malibu?

Cycling the ignition or clearing the codes with a scan tool removes the message, and it comes back as soon as the fault repeats. Fix the cause instead. Clearing codes also erases the freeze frame data a technician needs and weakens a future warranty claim.

How much does it cost to fix engine power reduced on a Malibu?

Nothing if the repair falls under N182188250, Recall 19V642000, or N192271200. Outside those, a throttle body cleaning runs roughly $100 to $200 at a shop, a pedal and sensor assembly starts around $223 by YourMechanic’s estimate, and reconnecting a charge air cooler tube can cost little more than the technician’s time.

Can I keep driving my Malibu in reduced power mode?

Drive to the nearest safe stopping point and no further. You cannot merge or pass, and on 1.5L turbo cars the same fault can stall the engine at idle.

What code causes engine power reduced on a Chevy Malibu?

P2138, pedal position sensor D and E voltage correlation, on 2016 to 2018 cars. On 2018 to 2022 turbo models, P0101, P0299, P0506, P1101, or P0172 point to the charge air cooler outlet tube coming off the throttle body.

Why does my Malibu say engine power reduced and service StabiliTrak at the same time?

Stability control and traction control share throttle authority with the engine control module. When the module stops trusting the throttle system, StabiliTrak loses a function it depends on and posts its own message. Repair the throttle fault and the StabiliTrak message usually goes with it.

Does Special Coverage N182188250 still apply in 2026?

That depends on your in-service date, not your model year. The term is 10 years or 150,000 miles from the date the vehicle was first placed in service. 2016 models are aging out through 2026, and 2018 models run into 2028. Ask a Chevrolet dealer to check your VIN in Investigate Vehicle History.

Is my 2020 or 2021 Malibu covered for the charge air cooler tube?

The 2019 model year has emissions recall N192271200. Model years 2020 through 2022 are addressed by bulletin 22-NA-224 rather than a recall, so coverage depends on your remaining powertrain or emissions warranty. Verify by VIN.

My Malibu was repaired under warranty and the message came back. What now?

Collect every repair order and count the attempts for the same fault. Repeat failures after covered repairs are exactly what warranty law exists for. Our team reviews repair histories at no cost.

The Short Version

“Engine Power Is Reduced” on a Malibu is a symptom, not a diagnosis. Scan it, look at the pedal harness or the charge air cooler tube depending on your year, and check your VIN against N182188250, 19V642000, and N192271200 before anyone quotes you a part. Most owners who get this message on a 2016 to 2018 car are entitled to a free repair and never find out.

When the car keeps failing after those repairs, the problem stops being mechanical and starts being legal. GM built the car, GM wrote the warranty, and GM carries the obligation when the fix does not hold.

Sources

• GM Special Coverage Adjustment N182188250, Loss of Continuity within Accelerator Pedal Position Sensor Circuit
• NHTSA Safety Recall 19V642000, GM campaign N192221960, 2018 Chevrolet Malibu fuel injector software
• GM Emissions Recall N192271200 and Service Update N192266090, charge air cooler duct disconnect at throttle body
• GM Service Bulletin 22-NA-224, November 2022, and Preliminary Information PIP5651F, August 2021
• GM Recall Bulletin 15176A, NHTSA campaign 15V164, Sunroof Switch Compliance, 2013 to 2015 Chevrolet Malibu
• GM Service Bulletin 18-NA-072, April 2018, DTC P228C on E85-capable vehicles
• Hutchinson v. General Motors LLC, No. 8:19-cv-01551, D. Md.
• Rothschild v. General Motors LLC, No. 1:19-cv-05240, E.D.N.Y., dismissed 2020
• California Song-Beverly Consumer Warranty Act, Senate Judiciary analysis of AB 1755 and SB 26
• Chevrolet Malibu accelerator pedal position sensor replacement cost, YourMechanic
• Chevrolet Malibu throttle position sensor replacement cost, RepairPal

This article is general information about vehicle defects and consumer warranty law. It is not legal advice, and reading it does not create an attorney-client relationship. Lemon My Vehicle is licensed to practice law in California and assists clients nationwide with federal warranty claims.