Low coolant level can activate this code as it means can cause the electronic thermostat to overheat. Next, check the coolant level in the radiator. Then, apply electro grease and confirm the tight connection. Corrosions can be removed using baking soda or by scraping. The first thing you should do in diagnosing this code is removing and inspecting the electrical connector. Open or shorted wiring harness in thermostat.Thus, corroded or loose connectors and wires are the common causes for this code. There are many possible causes for this code, and in many cases, it’s caused by a problematic electrical connector. Temperature gauge reading is abnormally high.However, in most cases, there are usually no noticeable difference in the vehicle’s performance and drivability. Symptoms of this code usually vary depending on the position of the thermostat when the failure occurred. Control circuit is probably open or short. If the PCM (powertrain control module, also known as ECM or engine control module in other vehicle makes) determines a fault in the engine’s thermostat, specifically if it’s experiencing a problem with the control voltage, then it will store this code. It monitors and controls the temperature of the engine to ensure it doesn’t overheat or suffer possible problems. On the other hand, reducing the temperature under load will increase power. The function of the thermostat is to control the flow of the coolant or temperature of the engine electronically, part throttle improves fuel economy and reduces emissions. An electronically controlled thermostat is composed of multiple temperature and load sensors, a computer program, and a control housing with a built-in thermostat. This fault refers to a problem in the system where the control voltage is nonexistent. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another. It’s particularly common among German manufactured vehicles, such as Audi, BMW, Jaguar, Mercedes Benz, Mini, Opel, and Volkswagen. This code is a generic trouble code that applies to all vehicles equipped with OBD-II system, especially those models made since 1996 up to present and with the same thermostatic control. Error Code P0597 is defined as Thermostat Heater Control Circuit Open.
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