What 114 owners told NHTSA about the 2015 Chevrolet Sonic

Passenger seat airbag shows that it is still off even when there is someone in the Passenger seat

NHTSA ODI 11739750

Odometer Fraud. The contact owns a 2015 Chevrolet Sonic. The contact purchased the vehicle from a dealer in March 2024. The contact stated that when the vehicle was purchased, the odometer at 60,000, and the advertisement stated 60,000. The contact recently acquired the Carfax report, which indicated that in April 2015, the odometer reading was 15,073 miles. The Carfax report indicated that the odometer reading was reported in April 2024 at 60,700 miles. The dealer was made aware of the discrepancy but provided no assistance.

NHTSA ODI 11690289

my recall is already completed, why on the your website still showing incompleted?

NHTSA ODI 11672416

The contact owns a 2015 Chevrolet Sonic. The contact stated that while operating the vehicle, the check engine light remained illuminated. The vehicle was taken to the local mechanic who diagnosed that the catalytic converter was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The local dealer was not contacted. The failure mileage was 115,000.

NHTSA ODI 11640293

I have had this vehicle for three years now and no matter of the repairs I had done to it by machanics the check engind light continue to turn on and the vehicle has shut down on the road and I can't find out what the solution is. I am afraid to drive it.Also the mylink radio which has all the vehicle settings in it has malfunctioned. I cannot get to reset veichle settings. Vehicle will not turn over on the first key turn. The engine turns over on the third or forth turn and when it dose there is a loud ratteling noise.

NHTSA ODI 11622159

Right Hand Steering Wheel Controls Inoperative, Outside Ambient Temperature Reading on Radio Display Inoperative, inoperative rear vision camera gridlines, and Onstar Menu Screen is Not Showing When Pressing Onstar Button. Inoperable radio steering wheel control buttons increase driver distraction risk in reaching for the radio display. Absence of rear camera gridlines reduce driver guidance in reverse. Onstar menu not starting in case of need. Reported in existing GM Technical Service Bulletin 16-NA-347. [XXX] ) Related to completed Key Chime recall completed prior to October 10, 2016. Current vehicle codes were reviewed by Hendrick Chevrolet Buick GMC Southpoint, and no existing error codes related to the issue were presented. No warning lamps on, messages on radio display, or other symptoms. Errors all presented simultaneously with no warning. Appeared first June 2024. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11620044

Code U0101 is set. Unable to communicate with TCM. Troubleshooted and found TCM is bad. Removed necessary components for tcm replacement. Removed the tcm/valve body assembly and replaced. Replaced necessary gaskets and reinstalled necessary components. Set transmission fluid level to specifications per procedure. Dealer advised they stock 3 TCM at all times due to many failures and demands of TCM.

NHTSA ODI 11616544

Stalls when reduced speed. CEL constant. Codes indicate Emission promlem. Cleared by replacing intake valve. CEL came back on.

NHTSA ODI 11609919

The air bags deployed while the vehicle was in motion. No Collision or impact occurred.

NHTSA ODI 11598544

The contact owns a 2015 Chevrolet Sonic. The contact stated while driving at an undisclosed speed, upon coming to a complete stop, the vehicle inadvertently lost motive power. After restarting the vehicle, the vehicle returned to normal functionality, but the failure became a regular occurrence. The traction control and check engine warning lights were illuminated. The vehicle was taken to an independent mechanic, who was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was notified of the failure but referred the contact to the NHTSA Hotline for assistance. The failure mileage was 117,000.

NHTSA ODI 11578281

The contact owns a 2015 Chevrolet Sonic. The contact stated the audible indicators for the driver's seat belt and the "Key Left in Ignition' was inoperable. The contactor also stated that the radio powered on independently, causing the driver to be startled due to the loud volume. No warning lights were illuminated. The contact stated that the failure persisted. The vehicle was diagnosed by the dealer, but not repaired. The vehicle was not included in NHTSA Campaign Number: 16V422000 (Electrical System, Equipment), 16V257000 (Equipment, Electrical System) or 15V416000 (Equipment). The manufacturer was not made aware of the failure. The approximate failure mileage was 80,000.

NHTSA ODI 11563279

First sign of problem - Sept. 2021. Driving on highway at about 35 mph. Simultaneously, engine quit running, door locks unlocked and all dash lights came. In a matter of less than a second the doors relocked, forward momentum of vehicle caused transmission to kick start the engine and jolt forward rather violently. Then the dash lights went off and the vehicle resumed normal operation. This continued to happen with increasing frequency. I took the vehicle to the local Chevy dealer to set up an appointment for service. When I explained the problem to the representative, he told me that the battery was the likely cause. I went to an auto parts store and had the battery checked. It did, indeed, have a bad cell. I replaced the battery and the car operated fine for several months but the problem began to recur, infrequently at first but continued to worsen. I discovered later that the same problem also happened when when the car was sitting idling. The difference was that without the forward momentum of the car, the engine did not restart and required being shifted into neutral and started with the key. Also, when driving at a speed of less than about 30 mph, the forward motion was not enough to kick start the engine and shifting into neutral and using the key to restart was necessary while coasting in traffic. Final symptom, the above has happened only now the dash lights go out and the vehicle does not respond at all. After several minutes and several attempts the lights come back on and the vehicle runs. The car had 55,563 miles on it when I bought it and in just over 3 years, I have put 6,237 miles on it and it now sits because I am afraid to drive it. I have had the vehicle back at the dealer twice since having the new battery installed. They simply tell me that they cannot recreate to get a code and therefore cannot help.

NHTSA ODI 11545878

Air bag light on. There are 4 codes in the SDM, due to an internal fault in the sensing diagnostic module. The dealership states that it has to be replaced and will cost close to $1100 to have repaired and to clear all of the codes.

NHTSA ODI 11528703

We have a 2015 Chevrolet Sonic Lt that we bought from car country in Aurora Indiana the transmission has gone the dealer told that the had been serviced but it never was so now we can't drive the car and its just sitting in the our driveway we reported it to car country about the transmission and they totally ignored us about it and refusing to help

NHTSA ODI 11525910

My cars coolant is leaking and the source is unknown. My car has overheated twice and my mechanic has been unable to find what needs to be repaired. The coolant has need to to be filled twice within a 6 month period. Now my car is having other issues with the catalyst system that lead me to believe the coolant leak might be affecting these other parts. My catalytic converter was already replaced and the same code has popped up 4 months later.

NHTSA ODI 11525327

Passenger side front airbags did not deploy during a front end vehicle crash. All other airbags in vehicle did deploy. Injury did occur due to this.

NHTSA ODI 11519192

The contact owns a 2015 Chevrolet Sonic. The contact stated that while the vehicle was turned on with the transmission in park(P), the doors would erroneously lock. On several occasions after parking and turning the vehicle off, moments later the vehicle would not restart. The vehicle was taken to an independent mechanic who checked the battery but found no failure. The cause of the failure was not yet determined. The local dealer and manufacturer were not yet contacted. The failure mileage was 39,000.

NHTSA ODI 11501197

The driver, and front passenger interior door handles the metallic chrome coating starts to lose its adhesive. When opening the door from the inside it cuts your hands if you don't notice it. Both door handles started to have the same issue within the same year. My children, my wife and myself all have been cut from the same problem. I tried to remove the parts that caused the injury due to us not being home and still required to use the door handles. I didn't want further injury to occur to my family.

NHTSA ODI 11495754

The contact owns a 2015 Chevrolet Sonic. The contact stated that while operating the vehicle, the odor of exhaust fumes was present inside the cabin of the vehicle. The vehicle was taken to an independent mechanic who diagnosed that the catalytic converter was faulty and needed to be replaced. The vehicle was not yet repaired. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet notified of the failure. The VIN was not available. The failure mileage 86,000.

NHTSA ODI 11490021

Once again, my doors unlocked then relocked, my dashboard lights went out and the engine stalled. I was on the KU campus when this happened 3 times within 6 blocks. This is getting very scary, especially when i am in a busy area of town. No codes have ever popped up. This has been happening since May 2022. I will keep reporting, hopefully there will be a recall soon. Very frustrated with this situation!

NHTSA ODI 11483637

On September 2, 2022, the locks on my car unlocked and relived while I was driving at about 20 mph. This keeps happening over the last 4-5 months. This time it happened twice in two blocks near my home. I have reported this several times. No codes ever come up. Sometimes the car will stall but always starts right back up. I know I am not the only one with this issue. Please find a cause and issue a recall to get this fixed! This can be very dangerous even life threading if there is an accident because of it.

NHTSA ODI 11482735

3 times yesterday - September 1, 2022, my car locks unlocked then locked again and the engine stalled. Dash lights did not go off, but the car died 3 times in a matter of 10 minutes.

NHTSA ODI 11482611

While driving, the locks on the car will unlock then relock quickly, the dash will go black and the motor will rev like I am trying to go in the Park position. This has happened several time in town where I live. Update from Aug 11, 2022The first time it happened I took it to the dealership and of course there were no codes and they couldn't find anything wrong. - [XXX], US INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ODI 11482351

Dashboard speed indicator dimming and getting brighter for no reason. no warning lamps. Check engine lamp turned on then after fueling vehicle engine won't start, or won't shut off. Vehicle is an automatic transmission. A button must be engaged to put vehicle in park, drive, etc. The Button often sticks and keys cannot be removed because the transmission won't go in to park . On July 17 the button popped out while driving. This could have stranded myself or my family. The cause of the issue is unknown, but drivers may become distracted when the end of the automatic gear shift lever pops out or as in my case when putting the vehicle into park it pops out and breaks off entirely. I believe it to be a defective part that can easily break. My vehicle has less than 70,000 miles. It has not been assessed by an insurance agent or dealership yet

NHTSA ODI 11474377

The manual transmission's clutch master cylinder failed on two occasions. It snapped into two pieces. On the first occasion, on March 24, 2022 I stepped on the clutch pedal, and it remained on the floor. The car was essentially inoperable. I was able to coast to a stop by the curb, but the car had to be towed. The part was repaired at a Chevrolet dealer with GM parts and returned to me on March 31, 2022. On June 9, 2022, the part failed again, in the identical manner. The part snapped into two pieces. The Chevrolet dealer is, over my objection, replacing the part. I have objected to the replacement of the part, because I am concerned that it is defective and certain to fail once again in the same way as it did on the two other occasions. I was fortunate on both occassions to be on suburban streets with very light traffic. I was able to coast to a stop at curbside on both occasions. My safety and the safety of others would have been at risk if the failure had happened on a heavily trafficked high-speed superhighway, or had I been ascending a hill on a busy road. The failure of the part makes it impossible for a driver to respond to the situation, as it disables the transmission system.

NHTSA ODI 11469185