Chevrolet Sonic overheating problems

Filed Jun 22, 2026 · Engine · TX

Engine Cooling System (Thermostat Housing / Water Outlet) The vehicle suffered a premature structural failure of the factory engine coolant thermostat housing. The component, which is manufactured from a fragile plastic composite, cracked completely open without warning, causing an immediate, rapid loss of engine coolant. This constitutes a severe safety hazard. A sudden, catastrophic loss of engine coolant under normal driving conditions puts the vehicle at immediate risk of severe engine overheating and sudden engine stalling or seizure while in motion. If the engine stalls unexpectedly in high-speed traffic, it strips the driver of power steering and braking assistance, drastically increasing the risk of a serious collision. General Motors is fully aware of this pervasive material defect across the Chevy Sonic model years, yet they refuse to issue a safety recall, forcing owners to operate vehicles with inherently flawed, dangerous plastic cooling components. They also refuse to help in getting the vehicle repaired or share the cost.

Filed Apr 21, 2026 · Body, Engine · NC

Oil cooling system has been replaced. Major leak in AC line needs replacement. Purge solenoid stop functioning and was replaced, now there is an additional major coolant leak

Filed Feb 18, 2026 · Engine · CA

This car overheated and a head gasket blew. I am on a Facebook forum, and it seems like all of these cars have these problems. The Chevy Sonic ltz turbo 1.4 2016 is known for coolant issues and head gasket failures. My car only had 104,000 miles on it. It should last a lot longer than that, but this is a common issue. For some reason there was a recall but they stopped fixing cars with 1.4 engines that came out after 2014. There cars don't have temperature gauges and when they overheat they don't tell you until a light comes on the dash and by then it's too late and your engine is blown. This should be illegal. Chevrolet needs to fix this.

Filed Jan 8, 2026 · Engine · 134,000 miles · MI · fire

The contact owned a 2013 Chevrolet Sonic. The contact stated that the vehicle had previously sustained undercarriage damage while driving at 20 MPH and hitting a pothole. The undercarriage was repaired. Additionally, the contact stated that while driving at 25 MPH, the vehicle started to overheat. A coolant temperature warning light was illuminated. The contact pulled into the Walmart parking lot and parked the vehicle. An independent mechanic was notified of the failure. The contact stated that while the mechanic was towing the vehicle to the repair shop, the vehicle caught on fire. The mechanic pulled over to the side of the road. The incident occurred near the mechanic's shop. The contact stated that the workers of a nearby recreation center extinguished the fire with fire extinguishers. There was no injury sustained. The vehicle was towed to an unknown location and was deemed a total loss by the insurance company. The contact stated that the fire originated from the engine compartment. A police report was filed. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 134,000.

Filed Jul 22, 2025 · Engine · IL

Dear GM Executive Office, I am writing in frustration and disappointment after being told today by Chevrolet Customer Assistance that the case I opened (Case # [XXX]) was simply a "dealer complaint" and that no further help would be offered - despite my vehicle exhibiting a recurring, safety-related malfunction covered under Special Coverage N232395330 - Turbocharger Replacement. To Whom It May Concern, I am writing to formally request a resolution regarding a recurring and unresolved issue with my son’s 2018 Chevrolet Sonic Premier (Turbocharged engine), VIN: [XXX] This past January we brought the vehicle to Ziegler Buick GMC of Lincolnwood an authorized due to overheating and a warning light. We paid $210 for a diagnosis and an additional $520 for a repair, totaling $730. The only action taken was the replacement of the coolant reservoir. The issue was not fully diagnosed, and the root cause was not addressed. On [XXX], the same issue has returned: Red heat warning light illuminated after less than one mile of driving. Coolant reservoir nearly empty upon inspection. Engine went into reduced power (“limp mode”). Scanner showed only a low coolant level but no additional actionable codes. Vehicle also displayed a change oil warning, likely triggered by overheating. This vehicle has a known history of turbocharger and coolant system defects, which have been acknowledged in GM technical service bulletins and Customer Satisfaction Programs. I have reason to believe this situation qualifies for one of those programs. Despite paying $730 for a prior repair, the vehicle is now exhibiting the same safety-related malfunction, putting my son at risk of engine damage and breakdown. We have also taken the car to Mike Anderson Chevrolet twice for inspection and they reported finding nothing. I am respectfully requesting the following: A thorough inspection and diagnosis of the entire cooling system and turbocharger INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOI

Filed Nov 13, 2024 · Electrical, Engine · MD

The thermostat housing and water pump keeps failing and leaking.The seat heaters dont work. The car started leaking antifreeze real bad which cause it to overheat and lock up. Yes it has been confirm by a dealer that alot of the chevys been coming for new thermostat housing and water pumps. No vehicle was only inspected by a dealer. The overheating like came on and then 10 seconds later the car locked up

Filed Jul 29, 2024 · Engine · 81,400 miles · PA

The contact owns a 2019 Chevrolet Sonic. The contact stated while pulling into the garage, the high engine temp warning light illuminated, and the engine was overheating. The contact immediately turned off the vehicle. The contact stated there was coolant underneath the front of the vehicle. The contact had learned that the water pump failure was common for the vehicle and believed that the water pump had failed. The contact was able to identify an extended warranty for the failure. The vehicle had not been taken to the dealer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure when it was confirmed that the VIN was not covered under warranty or recall. The manufacturer had referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was approximately 81,400.

Filed Apr 24, 2024 · Engine · PA

There is no temperature indicator and the car overheats. This caused the hose to the coolant to leak. I had the housing unit replaced but then the car still ran hot. I had the get the whole thermostat replaced. No forum could assist with the replacement of the 2019 as if this year model doesn’t exist and the part needed doesn’t fit properly making my car inoperable.

Filed Mar 9, 2024 · Engine, Transmission · AZ

1st occurence at approximately 37k miles on Vehicle has issue based on climate temperature sensor triggers a computer code 84 vehicle goes into limp mode to prevent engine failure however, this happens instantly no time to react and more than one occasion creating a hazardous driving situation in heavy traffic, vehicle also overheats creating hazardous leaks of anti freeze at boiling temperatures ability to burn anyone who comes in contact. This remains an ongoing issue with vehicle, vehicle now back in possesion of bank Santander Consumer USA, this is being reported to protect any innocent parties involved to avoid injuries or even fatality

Filed Jan 15, 2024 · MD

the CAR WAS BOUGHT IN May 24 of 2019. Since the car has been in the shop 4 times at JBA in Glen Burnie MD were I bought car From . Car been in Shop at JBA 01/29/2020 -Coolant Leaking , Was back in Shop 07/25/2022 - Water Pump Leaking , Car was Leaking Coolant, Back in shop October 2023 - For Over heating , Cooling System, Here we are January of 2024 car going back in shop at JBA or Cooling Issues