2013 Chevrolet Sonic engine problems

“Vehicle enters into catalyst monitor too early. Monitor Fales indicating that the catalyst is below efficiency threshold. A vehicle is run for a significant amount of time before being allowed to enter the driving conditions for the catalyst monitor, monitor will pass. This indicates that there is a programming failure, not an actual component failure. Theory has been tested multiple times. Catalyst had also been tested by temperature sensor as well as by taking readings with a gas analyzer before and after the catalyst. Everything indicates the catalyst is well within operating parameters. Theories, test, and confirmations have been conducted by a certified technician and mechanical engineer.”

“Was driving in heavy rain when car suddenly cut power and decelerated showed code 84 and the CEL came back with P2138. It is a known issue that rain gets up into the connector and causes a malfunction.”

“The contact owns a 2013 Chevrolet Sonic. The contact stated that there was fluid leaking from underneath the hood. The check engine warning light was illuminated. The contact stated that while driving at undisclosed speeds, there was an abnormal sound coming from the vehicle. The vehicle was taken to the independent mechanic where it was diagnosed with a water pump and the thermostat housing failure. The contact discovered Technical Service Bulletin: 14371B; however, the vehicle was not included. The manufacturer was made aware of the failure and a case was opened. The failure mileage was unknown.”

“2013 Chevrolet Sonic 1.8 L , fuel system lean ,mass airflow sensor, in limp mode preventing acceleration, gas tank when added gas....shuts down after start up-fuel system/gasoline; may cause possible fuel leak and could combust, alarm system and locks don't properly function - electric system equipment, insufficient welds...around fuel tank and front of vehicle on bottom by driver's side could also cause combustion, bcm codes that came up were communication, electrical, fuel, windows, and airbags! AutoZone codes were po171 and co561-77,I looked up recalls , several came up for my make and model but weren't specific to my vin# however my vehicle is doing everything pertaining to them! And I looked up if there was any special coverage on it and said there is...before 120k miles or ten years time. And I was never notified of it & never received anything in the mail ...”

“The contact owns a 2013 Chevrolet Sonic. The contact stated while driving 35 MPH, she heard abnormal knocking sounds coming from the rear wheels of the vehicle. Additionally, the contact stated that she heard clicking sounds while making turns. The check engine warning light was illuminated. The contact drove to her residence and parked the vehicle. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 150,000.”

“Multiple parts in my engine have malfunctioned in the past year, the most recent being a tube bursting and getting coolant everywhere. Other problems have been with valves, temperature gauges and even the radiator. It’s like something new breaks every month. I have had every issue fixed and usually I don’t get a warning lamp until I’m broken down on the side of the road.”