Purchased my car in october of 2018. in july of 2019, my check engine light came on, followed shortly afterward by the temperature overheat gauge. took my car in and was told that my thermostat needed replaced and that this is common with my make/model. replaced the thermostat. in january 2020, check engine light came on again, with a po599 code. took it to local auto shop to have it diagnosed; they said that the check engine light came on when starting the car, so likely wasn't an overheating issue. they thought it was the sensors/circuits. after running diagnostic check, again suggested replacing the thermostat. this is now the second time the thermostat has needed replaced in the year and three months that i have owned the vehicle. when at jiffy lube, i was told that they had seen at least four other sonics come in with the same check engine code.
Tl* the contact owns a 2016 chevrolet sonic. while driving 15 mph, the vehicle shut off without warning. the contact also mentioned that the vehicle shut off without warning while at a complete stop. the contact took the vehicle to an independent mechanic where they diagnosed the vehicle and replaced the oxygen sensor; however, the failure persisted. the contact took the vehicle back to the independent mechanic on numerous occasions and had the thermostat and intake main gasket set replaced, and an engine tune -up; however, the failure continued. the manufacturer and dealer were not notified of the failures. the vehicle was not repaired. the failure mileage was 78,456.