2020 Buick Enclave: check engine light

Filed Apr 10, 2026 · Brakes, Electrical · MI

1st incident i was backing out of a parking spot and it went into emergency park i had to turn off the truck , turn it back on and take it out of emergency parking 2nd incident a week later i was at a stop light the truck did the automatic shut off.When you have your foot on a break , I'll let go of the break to go through the light and it went into emergency park again Engine light is on auto zone says it one of 2 different catalytic converters unsure which one would have to get them both replaced over 500 each 3rd incident auto shutdown when stopped burnt out the starter no way to turn off the auto start stop 4th incident TODAY pulling into the parking lot at the grocery store.Doing about 10 to 15 mph truck just shut off It putting it's into emergency park or shutting of while driving is a SAFETY issue but no recalls Single mother can't afford to even have it looked at right now

Filed Mar 27, 2026 · Brakes, Engine · NC

The contact owns a 2020 Buick Enclave. The vehicle was reversed out of the driveway; however, after shifting into drive(D) and depressing the accelerator pedal, the vehicle jerked, vibrated, and the check engine warning light and other unknown warning lights illuminated. After several minutes, the vehicle functioned as intended. A short distance later, the failure reoccurred. The vehicle was taken to Auto Zone, but no cause for the failure was found. The vehicle was taken to a private dealer where it was diagnosed and determined that the catalytic converter was clogged, and that the electronic brake control center module and the transmission module had failed. The vehicle was not repaired. The contact stated that the failure persisted. The manufacturer was not made aware of the failure. The failure mileage was unknown.

Filed Jul 14, 2025 · Fuel system · 42,000 miles · AR

The contact owns a 2020 Buick Enclave. The contact stated that the check engine warning light was illuminated. The vehicle was taken to an independent mechanic, where the evaporative emission system, vapor canister purge solenoid, and the control solenoid were replaced; however, the failure persisted. The contact stated that the vehicle was difficult to start, and the instrument cluster gauges were fluctuating. The contact stated that the failure had occurred after refueling the vehicle. The contact stated that the failure had progressively worsened. The vehicle was taken back to the independent mechanic, where it was determined that the failure was related to the federal safety agency Campaign Number: 20V639000 (Fuel System, Gasoline), and the contact was referred to the dealer for assistance. The vehicle was taken to the dealer to be diagnosed. The vehicle was not yet diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 42,000.

Filed Oct 9, 2023 · Fuel system · FL

After filling up fuel, vehicle runs rough, hesitates, and stalls at idle speeds. This occurs after every fill up. The check engine light comes on and states an issue with the anti-lock brake system. I’ve had the vehicle checked by Buick 5 times and they have not been able to replicate the issue, so troubleshooting stopped. I know a recall came out this July for 2019 Buick Enclaves to replace the evaporative emissions purge valve due to not fully closing. This is the issue with my 2020 Buick Enclave and is a massive safety concern as the vehicle stalls while driving at slow speeds after fill up. Most recent event occurred on October 5th. I’ve posted a picture from last year that captured the same issue.

Filed Jul 1, 2020 · Transmission · 100 miles · KS

Bought brand new 2020 buick enclave, with 4 miles on it, on 6/13/20. Started having transmission problems almost immediately. The car would jerk hard (hard shift) when pushing on the gas and also anytime it was placed in park. On 6/21/20 the check engine light came on and the vehicle would barely shift. Called local buick - gm dealership to get repaired. Local shop restarted computer on 6/24/20 and said that it was good to go. Drove it less than 3 miles before service engine light came back on and jolting started again. On the drive back to the dealership the vehicle came to a hard jolting abrupt stop on the road. Vehicle would no longer start or shift. Had to leave vehicle in the middle of the road until dealership could come get it. On 6/26/20 dealership called to say that the vehicle was running good and ready to pick up. On 6/27/20 drove car about 15 minutes before the hard shift started happening again and the check engine light came back on. When attempting to shift into reverse, the vehicle hard jolted us backwards and then died. The vehicle would no longer start or shift gears. On 6/28/20 got the vehicle to start so drove the vehicle, as it was still hard shifting, back to the dealership and dropped it off. The dealership still has it as of today and has refused to give us any paperwork from our previous 2 attempts at getting it fixed however gave us falsified documentation stating that we only brought it in the shop 1 time, when it actually is the 3rd time to be taken in for the same problem to be fixed. Gm has refused to replace this defective vehicle nor return our money paid for it.

Filed Jun 22, 2020 · Acceleration, Transmission · 600 miles · KS

I bought a 2020 buick enclave, (owned by gmc) with 6 miles on it, 1 week ago. Yesterday the check engine light came on and the car started jerking anytime the transmission switched gears. I called to try to get it in to a certified buick dealership to be looked at and nowhere can get it in for 3-5 days and none of the dealerships will give a loaner car until the time of the vehicle appointment. I contacted buick directly regarding this and they told me the same thing, that we can't get a safe driving vehicle, until the one we have can be looked at by a dealership and if we take it to an un-certified shop that it would not be covered. So now I am stuck with either driving an unsafe car 50 miles on the highway to work for the next few days or not being able to go to work. This is a brand new car driven straight out of the floor room! Buick is putting people's life at risk by insisting that we drive this unsafe vehicle on the highway until we can get it looked at! Looks like a huge lawsuit in the making!!!!!