While driving on the highway at 60 mph, warning on dash came on saying “engine power reduced” and drop down speed to around 25 mph and I could not accelerate more than 25 mph on the highway which could have caused an accident because of the traffic flow behind me. I put a code scanner under the dash and it read code P2138, Throttle pedal position sensor switch.
2011 Buick Regal engine problems
111 complaints (40% of all complaints for this car). Typical mileage when it fails: 69,926. 2 crashes reported.
- owner complaints
- 111
- of this car's complaints
- 40%
- typical mileage
- 69,926
- crashes
- 2
- recalls
- 0
Which part fails
- Exhaust system: emission control: crankcase (PCV)1
At what mileage
Complaints by mileage at the time of the problem.
0k-25k
25k-50k
50k-75k
75k-100k
100k-125k
125k-150k
150k-175k
175k-200k
200k+
Buick Regal engine problems in other years
Specific symptoms reported on the 2011 Buick Regal engine
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Stalling 46Check engine light 25Loss of power 20Oil consumption 17Engine failure 16Misfire 8
Related recalls
No recalls on record for this model year.
What 2011 Buick Regal owners say
Most recent owner complaints, unedited.
The contact owns a 2011 Buick Regal. The contact stated that while driving at 30 MPH, the vehicle stalled with the check engine warning light illuminated. The vehicle was able to be restarted. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 140,000.
The cars mileage was altered due to car being wrecked prior and the other car that was used to replace wrecked parts was hidden and vin number was altered. Copart Inc and ICT Sharp Rides are party's involved, I bought car on 12/28/2023 mileage was listed as 132525
Preparing to park into a parking space in an off street parking lot the vehicle forcefully and rapidly accelerated on its' own and crashed into a fence. I was not accelerating. I attempted to stop the car using the brakes but they did not engage quickly enough to stop the rapid, forceful, and without warning acceleration. Buick has been contacted about the defect. Buick ran extensive diagnostics on the car and denies there is a defect. Police came to the scene and advised that given the 2 other incidents that I have experienced, the car is unsafe to drive given potential damage to others. A police report was filed.
When pulling into parking space the car rapidly accelerated on its' own and crashed into the car in the next parking space. I did not have my foot on the gas, the car was simply idling. The acceleration was so rapid that applying the brake was useless.
I was parking in marked space. I had turned into space, my foot was off the gas pedal. The car was 3/4 into the space when it malfunctioned and rapidly accelerated into a hardened snow bank. i instantly braked but there was not enough space to avoid collision.
The contact owns a 2011 Buick Regal. The contact stated that while driving on several occasions the headlights became inoperable. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic who informed the contact that the wiring in the bumper was hot at the base. The vehicle was taken to the local dealer where the engine was diagnosed. The vehicle was not repaired. The manufacturer was not notified. The failure mileage was unknown.
The contact owns a 2011 Buick Regal. The contact stated while driving 30 MPH and accelerating to enter the highway, the vehicle stalled. The contact stated that the traction, stability, and engine power reduced warning lights were illuminated. The contact stated she was able to park on the side of the road for 30 minutes before continuing to drive to her destination. The contact took the vehicle to the local dealer however, the mechanic was unable to diagnose the cause of the failure. The contact also stated that she was unable to open the doors due to the battery not charging. The vehicle was not repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 140,000.
While the vehicle was driving, there was a loss of power, at that moment sparks was seen emanating from under the hood, then the vehicle completely stopped running. Once pulled over smoke was bellowing out from the hood and subsequently ignited into flames. Fire department was dispatched and fire was extinguished. The vehicle was towed away and is still at the tow yard. The tow operator, based on visual inspection stated the fire did start in the engine compartment and spread to the fire wall, totaling the vehicle.
The engine shuts off when I slow down to make a left turn,this has happened twice. It does start again. I am afraid to drive it know.
Questions about the 2011 Buick Regal engine
Does the 2011 Buick Regal have engine problems?
Owners have filed 111 complaints about the engine of the 2011 Buick Regal, 40% of all its complaints, more than any other problem.
At what mileage do 2011 Buick Regal engine problems start?
The typical (median) mileage in owner complaints is 69,926 miles.
Is there a recall for the 2011 Buick Regal engine?
There is no recall for this problem on this model year.
Other 2011 Buick Regal problems
Electrical 75Transmission 39Lights 38Brakes 34Seats 29Driver assistance 20Fuel system 17Steering 17Acceleration 13Airbags 8Suspension 7Body 4Tires 3Seat belts 2Locks 1Visibility 1Wheels 1
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