engine coolant thermostat heater control circuit

A service manual or internet research is required for this process. The electronic thermostat will overheat if there is not enough coolant to clear the code.Ĭheck the thermostat’s resistance readings after removing the electrical connection. Tighten the connection with an o-ring and electrical grease. Scrape or use baking soda to get rid of any rust build-up. Remove the electrical connection and do a visual inspection of it. What Everybody Should Have in Their Tool Bag.

At this point, the technician should inspect every component, including the thermostat and the wire harnesses that link to it, to identify the problematic one. So that the technician doesn’t waste time doing fixes that don’t need to be done. You must clear the P0599 code from the PCM, and the system retests after each subsequent step. A cooling system inspection follows this to ensure no leaks exist and may be repaired. You should use the OBD-II scanner to verify the P0599 code.

Rarely a faulty PCM will be the cause of the issue.

These are some examples:Ĭorroded, loose, or otherwise damaged wire, connections, or harnesses in the circuit. Causes:Ī variety of factors may cause the P0599 error code. Symptoms may not be visible if the thermostat breakdown occurs while the engine temperature is correct. Overheating engines in cold weather or a slow-to-warm engine in hot weather might also indicate a problem with the vehicle’s cooling system. The P0599 code may cause a wide range of symptoms based on the thermostat’s location at the time of the failure. OBD-II Code P0599: Symptoms, Causes & Diagnose Symptoms PCM will record the P0599 error code if the voltage reading for the thermostat heating control circuit is greater than the manufacturer’s standards. The thermostat heater control circuit refers to the complete set of sensors and electric components. The thermostat heater unit needs data from several temperature sensors and engine sensors to regulate engine coolant flow and achieve optimum engine temperature.

Using a part throttle helps to increase fuel efficiency while also lowering pollution. The thermostat’s primary duty is to regulate the coolant flow or the engine’s temperature electronically. The Thermostat Heater Control Circuit High error code P0599 is described as Thermostat Heater Control Circuit High.

Engine coolant thermostat heater control circuit