2020 Buick Encore GX

70 complaints on file, page 1 of 4.

1. Filed Sep 26, 2026Failure Sep 3, 2026Abilene, KSElectrical system, Engine, Vehicle speed control

   While driving my 2020 Buick Encore GX, the vehicle experienced a sudden and dangerous loss of acceleration, immediately dropping into 'Reduced Engine power' limp mode in active traffic, but no other car was Infront or behind my car. A diagnostic scan revealed Diagnostic Trouble Code (DTC) P2138, which triggered the computer's safety override system to cut engine throttle. The official dealer repair invoice confirms a manufacturing and assembly defect covered under GM Technical Service Bulletin (TSB) #07-06-04-019G. The technician located water intrusion Panel/Body Harness Connector X112. The root cause was an improperly seated weather seal from the factory, which allowed moisture to short-circuit the accelerator pedal sensor voltage lines. The shop had to reposition the factory seal and apply dielectric grease to the terminals to correct the defect, for which I was charged out of pocket. This manufacturing defect caused a sudden, unpredictable loss of vehicle power on public roads, creating a severe rear-end collision hazard.

   NHTSA complaint 11767180
2. Filed Sep 14, 2026Failure Sep 8, 2026Bethesda, MDEngine, Unknown or other

   There was no service engine warning light on my dashboard. Pending codes in the pictures below popped up on my diagnostics tool less than 24 hours after buying the vehicle from an Audi Dealer. The engine went into limp mode as you can see from the picture below that shows Engine Power is Reduced. After researching these error codes, I was made aware that this is a common issue on this vehicle ad is should be a recall as it states the engine failure is a very serious issue, especially if it occurs while driving. This could cause fatal accidents.

   NHTSA complaint 11764192
3. Filed Sep 8, 2026Failure Aug 26, 2026Metamora, ILPower train

   While reversing, the vehicle suddenly jumped/jerked unexpectedly. Another vehicle was parked close behind me, and I was afraid my vehicle was going to jump into it because the movement was sudden and difficult to control. On another occasion, while traveling approximately 20 mph through a longer curve, the vehicle suddenly jumped/jerked again and I was concerned I could lose control of the vehicle or strike another vehicle. The vehicle has also intermittently shuddered/jumped during normal driving and acceleration. At times the engine RPM increases without the vehicle accelerating normally. The problem is intermittent and may stop and then happen again. This makes the vehicle’s acceleration and movement unpredictable, which I believe creates a collision risk when reversing, entering traffic, traveling through curves, or accelerating around other vehicles. An authorized Buick/GM dealership inspected the vehicle and diagnosed the CVT transmission as needing replacement at a cost of approximately $4,700. The dealership told me there were no transmission diagnostic trouble codes and no transmission warning lights despite the symptoms and their diagnosis. I am concerned that this transmission condition can cause sudden jerking/jumping and unreliable acceleration without a warning light or diagnostic code alerting the driver. The transmission has not been replaced and the vehicle is available for inspection.

   NHTSA complaint 11762916
4. Filed Aug 29, 2026Failure Aug 8, 2026Mcallen, TXElectrical system, Power train, Unknown or other

   The cluster display shows "shift to park" even while vehicle is stopped, gear shift in park position, and engine is off.

   NHTSA complaint 11760579
5. Filed Jul 22, 2026Failure Jul 18, 2026Belleville, ILElectrical system, Engine, Fuel/propulsion system

   I am submitting this complaint regarding several serious mechanical and electrical issues with my 2020 Buick Encore GX that raise significant concerns about the vehicle's reliability and safety. Most concerning, I was recently informed by the dealership that my vehicle requires another transmission replacement, despite having the transmission replaced in 2024. I was also advised that I would need to pay for an additional diagnostic inspection because technicians discovered oil leaking through the lines, which appears to have contaminated engine components. According to the dealership, metal particles have been found within the engine, causing it to malfunction. They have stated that they are unable to determine the source of the contamination at this time. In addition to these major mechanical concerns, I am experiencing several electrical and system malfunctions, including: The passive keyless entry system does not consistently unlock the doors using the exterior door handle, even with a brand-new battery installed in the key fob. The vehicle repeatedly displays a "Shift to Park" warning even though the gear selector is already in the Park position. The vehicle continues to display brake-related alerts and notifications indicating that the brakes need to be serviced or replaced, despite having brand-new brakes installed. These ongoing issues have resulted in repeated repair costs, loss of confidence in the vehicle, and concerns about my safety while driving. The transmission failure occurring shortly after a previous replacement, combined with unexplained engine contamination and persistent electronic malfunctions, suggests there may be underlying defects that warrant further investigation. I respectfully request that these issues be thoroughly investigated to determine whether they are related to known manufacturing defects or warrant a safety recall or other corrective action. I also request that Buick review my repair history and provide appropriate assistance.

   NHTSA complaint 11752226
6. Filed Jun 21, 2026Failure Jun 4, 2026Port Huron, MIPower train

   Transmission would not connect with the engine. La Fontaine dealership in Saint Clair. Said I need a new transmission cost $14,000. It has 59823 miles under the vehicle.

   NHTSA complaint 11745442
7. Filed Apr 14, 2026Failure Mar 16, 2026Houston, TXUnknown or other

   My 2020 Buick Encore GX which has only $30,600 had the "Shift to Park" message appear on the dashboard screen and my car was not turning off properly. I read online that it is a widespread known issue: however, I had to pay $630.14 to fix the GM well know widespread issue so I can turn off my vehicle. This should be covered FREE of charge by GM as they are aware of the issue affecting the 2020 Buick Encore GX.

   NHTSA complaint 11731062
8. Filed Mar 24, 2026Failure Mar 23, 2026Milwaukee, WIPower train

   I am writing to formally report a serious mechanical failure involving my vehicle and to request further review and assistance. While operating my vehicle, it unexpectedly stalled in the middle of an intersection, creating a significant safety hazard. At the time of the incident, the check engine light illuminated and the RPMs surged to a range between 6 and 8. I was able to safely move the vehicle to the side of the road, place it in park, and have it towed to a dealership for inspection. Following their evaluation, I was informed that the transmission requires replacement. I have since become aware of a recall related to transmission issues; however, I was advised by a Buick representative that my VIN is not included in the recall. Given that my vehicle is experiencing the same or a substantially similar failure, this determination raises concerns and warrants further review. I have consistently adhered to all recommended maintenance schedules and have taken proper care of my vehicle. Based on the circumstances, I respectfully request a thorough reassessment of my case, including reconsideration for coverage or assistance with the necessary repairs. I appreciate your prompt attention to this matter and look forward to your response.

   NHTSA complaint 11726783
9. Filed Feb 20, 2026Failure Feb 19, 2026New Bern, NCElectrical system, Power train

   My 2020 Buick Encore GX is showing a message with accompanying ding ding sounds "Shift to Park" after I put my car in park. This malfunction will not allow the car to be locked. I see there are many complaints and lawsuits that GM has not attended to. How do we get GM to initiate a recall on something they are and were well aware of.

   NHTSA complaint 11719307
10. Filed Feb 17, 2026Failure Feb 16, 2026Bandera, TXEngine, Power train

    2020 Buick Encore GX; pulling out of a service station, my check engine light illuminated, and message on cluster stated: Engine Power Reduced. I loss throttle response for accelerating. Accelerator pedal was pushed to the floor and no acceleration. Vehicle entered limp mode. Drove 15 miles from service station to my home, in limp mode, unable to accelerate. Called a technician mechanic who check for Diagnostic Trouble Codes; DTC P0299 Turbocharge/Supercharge "A" Under boost condition; is Confirmed, Pending, and Permanent code. Loss of power to Power Train, unable to accelerate.

    NHTSA complaint 11718640
11. Filed Nov 25, 2025Failure Nov 3, 2025Arlington Heights, ILElectrical system, Power train

    SHIFT INTO PARK WARNING WHEN CAR IS IN PARK

    NHTSA complaint 11701517
12. Filed Oct 27, 2025Failure Sep 15, 2025Springfield, VTPower train

    Powder Train When parking the car in garage, placed vehicle in park, then turned vehicle off, received a message on dash "SHIP TO PARK". The car was in park. Even thought the engine was off, it would now allow radio or lights to shut off util message goes off. Some times several minutes for it to go out. Taken it to the GM dealer ship was told shifter assembly needs replaced. I have learned their currently is a a class action suit for this issue at this time. My car was under warranty for 5 years and was still under the warranty when this happened to me. I don't feel I should have to pay $491.00 out of my pocket.

    NHTSA complaint 11695793
13. Filed Oct 25, 2025Failure Oct 25, 2025Crystal Lake, IL, ILWarnings, Unknown or other

    To Whom It May Concern, I am submitting a formal complaint regarding a recurring issue with my 2020 Buick Encore GX (VIN: [XXX] ) related to the “Shift to Park” defect, which is documented in GM’s Technical Service Bulletin 23-NA-119. My vehicle intermittently fails to recognize when it is in park, preventing me from turning off the engine and causing safety and usability concerns. Despite following GM’s recommended steps and scheduling an appointment through Buick Customer Care, I was charged $195 for a diagnostic fee and quoted $495 to replace the shifter assembly. The dealership confirmed the issue matched the bulletin, yet refused to offer goodwill coverage or reimbursement. This expense is a significant hardship. I am still making payments on this vehicle, which is barely five years old. I previously owned a Honda for 20 years without encountering issues like this. Unfortunately, this is not the first time I’ve faced a manufacturer-documented defect with no support. My previous vehicle, a Mitsubishi Outlander, suffered from a known transmission issue that was later part of a class action lawsuit. Despite experiencing the same symptoms, my VIN was excluded. The cost of repair outweighed the value of the vehicle, and I ultimately had to walk away from it as a total loss—leaving me without a car. I am deeply disappointed to now face a similar situation with Buick. I chose this vehicle expecting reliability and support, and I’ve done everything asked of me to address this issue responsibly. I believe GM should be held accountable for this known defect and the financial burden it places on consumers. Thank you for your attention to this matter. Sincerely, [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

    NHTSA complaint 11695563
14. Filed Oct 22, 2025Failure Oct 22, 202551,220 milesColorado Springs, COTurbo/supercharger

    The contact owns a 2020 Buick Encore GX. The contact stated that while driving at an undisclosed speed, the vehicle began to shake with abnormal sounds coming from the engine compartment. The check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed and it was determined that the turbocharger had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the dealer for further assistance. The approximate failure mileage was 51,220.

    NHTSA complaint 11695087
15. Filed Oct 20, 2025Failure Jul 11, 2025Tacoma, WAUnknown or other

    I am getting a shift to park message on my Buick. I have to shift through heats multiple times to get it to stop.

    NHTSA complaint 11694632
16. Filed Sep 10, 2025Failure Aug 28, 2025Huntsville, ALElectrical system, Unknown or other

    When I put the car in park and go to turn off the car, I'm getting a "Shift to Park" error when the car is already in park. This error will not allow the car to shut off. I have to shift it back out of gear and then back to park several times before it will recognize that it's in park and allow me to turn off the car.

    NHTSA complaint 11686346
17. Filed Sep 4, 2025Failure Aug 15, 2025Charlotte, NCUnknown or other

    Getting a shift to park error when placing the gear in park. It’s not recognizing the car is already in park and I have to make several attempts until it finally goes away each time.

    NHTSA complaint 11685063
18. Filed May 13, 2025Failure Dec 30, 2024101,000 milesO'fallon, MOService brakes, Caliper

    The contact owns a 2020 Buick Encore GX. The contact stated that while shifted into reverse on several occasions, the brake was depressed and there was an abnormal foghorn sound coming from the driver’s side rear wheel. The vehicle was taken to a dealer however, the failure was not duplicated. The vehicle was taken to the residence where the rear driver’s side wheel was removed. The caliper was removed, and the contact became aware that piston inside the caliper had fractured in half. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 101,000.

    NHTSA complaint 11660619
19. Filed May 11, 2025Failure Apr 1, 2025Jacksonville, FLUnknown or other

    I have started to receive multiple 'Shift to Park' messages when attempting to turn off my vehicle after already being placed in park. To get the car to register that it is indeed in park, I have to re-shift or slam the gear shift into place. I was advised that the issue was with the shifter assembly which prevents the vehicle from recognizing whether or not it is in gear. I had no issues with the vehicle prior to the message and I get my vehicle serviced regularly. This malfunction can lead to battery drain, failure of a vehicle to shut off completely, or difficulty starting it.

    NHTSA complaint 11660272
20. Filed Apr 25, 2025Failure Apr 5, 2025Bakersfield, CAService brakesCrash1 injured

    I was traveling to school when my breaks didn’t work I tried them twice and I crashed into another vehicle. And the month or march I took it into to Buick for break issues and they said everything was fine.

    NHTSA complaint 11656817