Other things that can cause the temp gauge to spike are: If you’ve noticed this, you need to get off of the road and get your Sonic’s engine shut down as soon as possible, before any lasting damage can occur.Ī bad thermostat can cause the temp gauge or warning lights to come on. The first sign of a bad head gasket that most people are going to notice is a warning light or spiked temperature gauge. Here’s more on no heat diagnosis if this is what you are experiencing. On very cold days, this cooling capacity is not needed, and the engine never warms up. When this happens, coolant constantly cycles through the engine. If your Sonic has no heat at all, it is entirely possible that the thermostat is stuck open. Hopefully you’ve caught your bad thermostat before this has happened.
![2013 chevy sonic engine coolant thermostat heater 2013 chevy sonic engine coolant thermostat heater](https://i.ebayimg.com/thumbs/images/g/2SIAAOSwM91gBgqo/s-l300.jpg)
Signs of a bad head gasket include:Ī head gasket is a very costly and time consuming repair. If your Sonic runs too long without coolant circulating through the engine, the head gasket can blow. When this happens, the coolant in the radiator stays relatively cool, and the engine overheats fast. This keeps the coolant from entering the engine. The most common symptom of a bad thermostat is overheating. Here are the most common signs of a bad thermostat. Thermostats are very inexpensive, f you do end up needing one. Hopefully you’ve caught them before any damage was done. There are a few ways that your Sonic will tell you that your thermostat is bad. Symptoms of a Bad Thermostat: Chevy Sonic Some of the most common symptoms of a bad thermostat are no heat, a spiked temp gauge, blown head gasket, and more. When it goes bad, you’ll experience a number of different problems. Your Chevy Sonic relies on a thermostat to control the temperature of the engine.