BMW DTC P0598 – Thermostat Heater Control Circuit Low
DTC P0598 meaning on BMW
DTC P0598 on a BMW indicates an issue with the thermostat heater control circuit being detected as low. This means that the powertrain control module (PCM) has detected a lower than expected voltage in the circuit responsible for controlling the thermostat heater.
BMW DTC P0598 symptoms
Symptoms of DTC P0598 on a BMW may include:
- Engine running hotter or colder than normal
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced fuel efficiency
BMW DTC P0598 causes
The common causes of DTC P0598 on a BMW include:
- Faulty thermostat heater
- Wiring or connector issues in the thermostat heater circuit
- Defective powertrain control module (PCM)
BMW DTC P0598 seriousness
While DTC P0598 may not cause immediate drivability issues, it can lead to engine performance problems and reduced efficiency if left unresolved. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P0598 on BMW
To diagnose DTC P0598 on a BMW, you can follow these steps:
- Use an OBD-II scanner to retrieve the fault codes
- Inspect the thermostat heater circuit for any visible damage or loose connections
- Test the thermostat heater for proper functionality
- Check the PCM for any signs of malfunction
How to fix DTC P0598 on BMW
To fix DTC P0598 on a BMW, you can try the following solutions:
- Replace the faulty thermostat heater
- Repair any damaged wiring or connectors in the circuit
- If the PCM is faulty, consider reprogramming or replacing it
How to erase DTC P0598 on BMW
To erase DTC P0598 on a BMW, you can clear the fault codes using an OBD-II scanner. After addressing the underlying issue causing the fault code, clearing the codes will reset the Check Engine Light and verify if the problem has been resolved.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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