2021 Buick Encore GX Powertrain (other) Problems

A 2021 Buick Encore GX with 66,828 miles experienced sudden transmission failure while driving. The vehicle lost forward gear engagement and began slipping, creating an immediate safety risk to the driver and other motorists due to unexpected loss of vehicle propulsion and control. The vehicle was diagnosed by an authorized GM dealership. Diagnostic codes P2714 (Transmission Control Solenoid Valve 4 Stuck Off) and P0700 (Transmission Control Module Request) were confirmed. The transmission fluid was found to have a burnt odor indicating severe internal damage. The check engine light was the first warning symptom, followed by slipping and loss of forward gear. General Motors previously issued Technical Service Bulletin 24-NA-009 in March 2024 specifically identifying DTC P2714 on the 2021 Buick Encore GX as a known internal defect affecting model years 2020 through 2024. This bulletin confirms GM was aware of this defect prior to this vehicle's failure. Despite issuing this bulletin, GM has not issued a recall, leaving owners of affected vehicles responsible for repairs caused by a known manufacturer defect.

NHTSA ID

11735946

Incident

May 1, 2026

Turbocharger is defective. Reduced engine power. Engine Power reduced shows up on my dashboard. I bought the car brand new at Lindsey Buick in Ohio. This car is too young for this problem. Lindsey Buick and GM need to stand up to accountability and transparency when it comes to delivering top quality products. My vehicle almost caused a horrific accident by not accelerating fast enough. I am [XXX] , a widow, and in need of my car being fixed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11733173

Incident

Apr 6, 2026

The contact owns a 2021 Buick Encore GX. The contact stated that while attempting to park the vehicle, the message to “Shift to Park” was displayed while the vehicle was already shifted in park(P). The contact stated that several attempts to shift to park were needed to clear the message. On several occasions, the contact drove the vehicle and then shifted back to park(P) for the message to be cleared. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 58,000.

NHTSA ID

11723351

Incident

Mar 10, 2026

Mileage

58,000 mi

The contact owns a 2021 Buick Encore GX. The contact stated that during a routine oil change at the local dealer, the contact informed the dealer that while in the park or shifting to park, the engine was shutting off unexpectedly. The message to “Shift to Park” was displayed and the vehicle was difficult to turn off. The contact wiggled the ignition to shut off the vehicle. There were no warning lights illuminated. The failure persisted over time. The contact was concerned about being stranded due to the failure. The local dealer was contacted, and it was determined that there was no warranty or recall coverage on the vehicle. The vehicle was not diagnosed or repaired. The contact had scheduled an appointment for a diagnostic test. The manufacturer was contacted and confirmed that there was no warranty coverage on the vehicle, and no assistance was provided. The failure mileage was approximately 17,500.

NHTSA ID

11713934

Incident

Dec 2, 2025

Mileage

17,500 mi

When trying to park/shut off, the vehicle gives ‘shift to park’ error message upon shifting to park and won’t shut off or when starting will give ‘shift to park’ error message and not start. This seems to be a common issue with this vehicle model…we could really use a recall

NHTSA ID

11710497

Incident

Dec 19, 2025

When I put my car into Park, a bell alarm sounds and a message shows up to put the car into Park. While it’s already in Park. I then push the stick shift forward and the bell alarms stops and message disappears.

NHTSA ID

11684331

Incident

Aug 24, 2025

The contact owns a 2021 Buick Encore GX. The contact stated that after parking the vehicle and shifting to park(P), the vehicle failed to immediately shut off. During the failure the message "Shift to Park" was displayed. The contact stated that the failure was intermittent. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure, but no assistance was offered. The failure mileage was 57,000.

NHTSA ID

11665822

Incident

Jun 2, 2025

Mileage

57,000 mi

I went off the road after my check engine light came on and my vehicle decided to jerk and wouldn’t go over 66 miles. It happened randomly

NHTSA ID

11617636

Incident

Oct 2, 2024

The contact owns a 2021 Buick Encore GX. The contact stated that while shifting to park(P) and attempting to turn off the vehicle, the message to shift to park(P) was displayed on the instrument panel. The contact removed the key from the vehicle, but the vehicle failed to turn off. The battery had to be disconnected to turn off the vehicle. The vehicle was taken to the dealer to be diagnosed; however, the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was made aware of the failure and confirmed that the VIN was not under recall. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 61,000.

NHTSA ID

11615896

Incident

Sep 9, 2024

Mileage

61,000 mi

I bought my vehicle the later part of 2021 and the transmission and engine no longer work and need to be replaced. When I first purchased the vehicle the battery completely died in less than 6 months. Numerous repairs and now the warranty won't work since I am over 60000 miles even though I have not met the expiration date on my warranty. They want to charge me between 8000-12000 for repairs.

NHTSA ID

11559624

Incident

Dec 10, 2023