2021 Buick Encore GX: check engine light

Filed Jul 8, 2026 · Electrical, Engine · NJ

While driving check engine suddenly illuminated following by a "warning reduced engine power" message. Car began driving sluggish and driving over 35mph caused serious trembling. After multiple diagnosis with several engine codes pointing to issues with ECM, and mass air flow sensor, and the wiring affliated . I took the vehicle to the GMC dealership to get vehicle serviced and was told the wiring had broken and melted which caused the check engine to come on and the vehicle to drive the way it did. The cause was the zip tie being tied too tight as stated in GMs own bulletin number 22-NA-008. This should be a bulletin it should be a recall!

Filed May 5, 2026 · Transmission · NC

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.

Filed May 2, 2025 · Fuel system · KY

Turbo charger has gone out 4 times since I purchased it in April 2021. I have been on the interstate driving and suddenly my car slows down and a message that says “engine power reduced” comes up and my check engine light comes on. This is dangerous as I was on the interstate with 18 wheelers and could’ve been rear ended and badly hurt or killed. My grandchildren could’ve been in the car with me. When this happens the vehicle slows down considerably and does not accelerate properly. I have to drive in the right lane at a much slower speed putting myself and others in danger. Leachman Buick in Bowling Green, KY has repaired the car twice. Campbell Chevrolet in the same city has repaired it twice and it is currently at this dealership due to the engine power situation occurring again. This has caused me severe inconvenience as I have had to drop my car at the dealership several times in the past few weeks and rearrange my schedule as a rental car has not been provided. Campbell Chevrolet repaired the vehicle a few weeks ago and the check engine light and reduce power message was back on within 6 hours of them initially completing the repair. Two weeks or less it was the waste gate actuator solenoid that was replaced but the engine message and check engine light are back on. I am VERY FRUSTRATED at having to jump through hoops regarding this vehicle. I own the Bluegrass Edition model and it is obvious that something serious is wrong with the car and Buick needs to recall the car IMMEDIATELY. It is either a lemon or something else is causing the turbo charger to repeatedly fail. I have taken the car to TWO different dealerships and neither one of them have been able to rectify the issue long term. The vehicle needs to have a TOTAL diagnostic test on EVERYTHING relating to the engine and power system. PLEASE LOOK INTO HAVING THIS VEHICLE RECALLED AS I DO NOT WANT TO LOSE MY LIFE ON THE INTERSTATE DUE TO REDUCED ENGINE POWER AND MY CAR AUTOMATICALLY SLOWING DOWN!!

Filed Oct 10, 2024 · Engine · AL

The check engine light will come on with engine power reduced, code reads turbo under boost, The car will stay in limp mode and make it difficult to get out of traffic there is no warning before the car completely loses power and goes into limp mode!!

Filed Oct 2, 2024 · Engine, Fuel system · TX

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

Filed Sep 11, 2024 · Engine · 45,000 miles · MD

The contact owns 2021 Buick Encore GX. The contact stated while driving 70 MPH and accelerating, the check engine warning light illuminated. The vehicle was taken to an independent mechanic and was diagnosed with turbo charger failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 45,000.

Filed Aug 8, 2024 · Engine · MD

Have had my car in the shop multiple time to be put on computer. It states under boost in the turbo. This car is barley 3 years old . And when the check engine light comes on the car goes into limp mode. This is just crazy . I've read more and more people complaining about this but buick doesn't want to do anything about it

Filed Jul 12, 2024 · Engine · 32,500 miles · IL

The contact owns a 2021 Buick Encore GX. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that occasionally the vehicle jerked with the check engine warning light illuminated. In addition, the contact stated that the speed odometer showed a different speed that the digital speed odometer reading. The vehicle was taken to the dealer where it was diagnosed with a failed turbo charger. The contact was informed that the turbo charger needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. Additionally, the contact stated that the vehicle had been taken to the dealer twice for the same failure. The contact stated that the vehicle was scheduled for diagnostic testing. The manufacturer was not made aware of the failure. The failure mileage was approximately 32,500.

Filed Sep 20, 2022 · Engine · 43,000 miles · MD

The contact owns a 2021 Buick Encore GX. The contact stated while driving approximately 60 MPH, the check engine warning light illuminated with the “Engine Power Reduced message displayed. The contact stated that the vehicle lost motive power and the vehicle failed to exceed 25 MPH with the accelerator pedal depressed. The contact stated that the loss of power had become a recurring failure and occurred at various speeds. The contact had taken the vehicle to a local dealer, who diagnosed that the intercooler on the turbo needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was returned to the dealer multiple times for the engine failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 43,000.

Filed Oct 6, 2021 · Engine · 9,000 miles · MD

The contact owns a 2021 Buick Encore GX. The contact stated that while at a stop sign, the RPM was fluctuating from 0 to 3,000 RPM. The contact stated that the vehicle stalled with the check engine warning light illuminated. The vehicle was able to be restarted. The contact mentioned the failure recurred multiple times with the vehicle being unable to be restarted. The vehicle was taken to the dealer where it was diagnosed that the emergency jack needed to be repaired under recall. The vehicle was repaired however, the failure persisted. The vehicle was taken back to the dealer for a second time however, the failure was undetermined. After the third failure, the vehicle was diagnosed with an unknown software needing to be reprogrammed. The vehicle was diagnosed a fourth time and the contact was informed that the engine may not be receiving gasoline and needed to be repaired. The vehicle was repaired each time however, the failure continued. The manufacturer was notified of the failure. The approximate failure mileage was 9,000.