P0598 Thermostat Heater Control Circuit Low
OBD-II Trouble Code Technical Description
Thermostat Heater Control Circuit Low
What does that mean?
This is a generic powertrain diagnostic trouble code (DTC), which means it covers all makes/models, 1996-newer. However, specific troubleshooting steps will vary depending on the vehicle.
The codes P0597, P0598 and P0599 all refer to an electronically controlled engine thermostat. They are generic codes, meaning they pertain to all vehicles using this type of thermostatic control, however, only a small number of manufacturers employ this type of system. Therefore, this trouble code article is basically identical for all three codes.
The P0598 diagnostic trouble code indicate a fault has occurred with this system where the control voltage is low. For the most part, German manufactured vehicles such as BMW, Mercedes, Audi, Mini, Volkswagen, Opel and Jaguar use this system.
The electronically controlled thermostat consists of various temperature and load sensors, a computer program and the control housing with a built-in thermostat.
Concept
By controlling the coolant flow or engine temperature electronically, part throttle increases fuel economy and reduces emissions, whereas reducing the temperature under load increases power.
Symptoms
Symptoms will vary depending on the position of the thermostat at the time of failure, however, it is unlikely that there will be any noticeable difference in the operation of the vehicle.
Potential Causes
Experience dictates that the problem usually lies in a loose or corroded electrical connector or the electrically operated thermostat itself is at fault. Occasionally, the Motronic (engine management) computer fails, but is the least likely cause.
Diagnostic and Repair Procedures
This information needs to include the identification of the pins and their location, color of the wires, pin values in volts at specific temperatures and resistances. These values and flow of diagnosis varies from manufacturer to manufacturer and with engine size.
You will also need an infrared temperature probe and volt/ohmmeter.
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Let us fix your problem. You are most welcome our diagnosis experts have in most cases the knowledge and skills to find the cause of the error code p0598 and to solve the problems.
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"Delete Error Code Permanently, Disable DTC Error Code Function for p0598 in the ECU"
In extreme cases, we even have the option to permanently remove the specific DTC p0598 and disable the function of the specific error code in the ECU. All other fault code functions will then continue to work to protect the engine. This is different from clearing an error code with a diagnostic device. We have the option to permanently remove the function of the specific error code, so that it never comes back. Also emergency running that occurs on the specific error code can be solved in most cases.
Of course we prefer to first try to solve the cause of the error code, but sometimes the only solution is to permanently disable the DTC function of p0598.