If you own a BMW and see the P0598 code on the dashboard, you know something’s wrong. This code indicates that the vehicle is experiencing an issue with the thermostat heater control circuit. In other words, the engine’s warm-up performance is not monitored correctly due to a defective coolant thermostat providing false readings. To determine the root cause of the problem, it is important to understand the potential causes and solutions for the BMW P0598 Code.
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Causes and Solutions for the BMW P0598 Code
| Cause | Solution |
|---|---|
| Low coolant level or incorrect coolant mixture | Check the coolant level and refill the coolant if necessary |
| DME detects a short circuit wiring in the ECT | Replace the wiring in the ECT |
| CHT sensor is out-of-calibration, or it has failed | Calibrate or replace the CHT sensor |
| ECT sensor is out-of-calibration, or it has failed | Calibrate or replace the ECT sensor |
| Replace the thermostat | Replace the thermostat with a new one |
When you see the BMW P0598 Code, it can be problematic and difficult to understand what is causing the issue. Fortunately, there are a few potential causes and corresponding solutions. The engine temperature must be less than 65°C for the code to be thrown, and it is important to be aware of the potential causes so that you can take the necessary steps to resolve the issue. If the coolant level is low or incorrect, the coolant should be checked and refilled if necessary. If the DME detects a short circuit wiring in the ECT, the wiring should be replaced. Additionally, if the CHT or ECT sensor is out-of-calibration or failed, it should be calibrated or replaced. Lastly, the thermostat should be replaced with a new one if needed.
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Conclusion
If you have seen the BMW P0598 Code on your vehicle’s dashboard, it could indicate an issue with the thermostat heater control circuit. By understanding the potential causes and solutions for the BMW P0598 Code, you can take the necessary steps to resolve the issue and get your vehicle back up and running again.
FAQs About BMW P0598 Code
What does the diagnostic code P0598 indicate?
When discussing OBD-II diagnostic code P0598, it points to newer engine models that employ electronically regulated thermostats overseen by the engine control module (PCM). If the PCM identifies an anomaly in the signal from the thermostat, it will register the P0598 code. For vehicles displaying this code, it’s advisable to consult a mechanic for further inspection.
What does it signify when the thermostat heater control circuit is open?
When the P0597 diagnostic code pops up, it predominantly stems from a malfunctioning thermostat. If the thermostat ceases to operate and warrants a replacement, this specific code will likely be displayed.
What is inferred by the thermostat heater control circuit being high?
The diagnostic trouble code P0599 denotes “Thermostat Heater Control Circuit High.” It activates when the powertrain control module (PCM) identifies an irregular signal from the thermostat. Factors causing the P0599 code to surface include issues with wiring or connectors, a defunct thermostat, coolant leakage, or PCM malfunctions.
What’s the designated code for the malfunctioning heater control sensor?
Regarding OBD diagnostic codes, P0036 pertains to the “HO2S Heater Control Circuit – Bank 1 Sensor 2.” It gets registered when the Engine Control Module (ECM) identifies potential issues related to the heater control circuit for the bank 1 secondary sensor or sensor 2.