BMW DTC P0859 – Traction Control Input Signal High
DTC P0859 meaning on BMW
The Diagnostic Trouble Code (DTC) P0859 for BMW indicates that there is a high input signal detected from the traction control system. This means that the control module has detected a voltage signal higher than the specified range from the traction control system.
BMW DTC P0859 symptoms
Symptoms of DTC P0859 on a BMW may include:
- Traction control warning light illuminated on the dashboard
- Traction control system may be disabled
- Reduced traction control functionality
BMW DTC P0859 causes
Common causes of DTC P0859 on a BMW include:
- Faulty traction control switch
- Wiring or connection issues in the traction control system
- Defective traction control module
BMW DTC P0859 seriousness
While DTC P0859 may not directly affect the drivability of the vehicle, it is important to address this issue promptly to ensure the proper functioning of the traction control system. Ignoring this DTC could lead to potential safety risks, especially in adverse driving conditions.
How to diagnose DTC P0859 on BMW
To diagnose DTC P0859 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the traction control switch and its wiring for any visible damage
- Check the traction control module for any signs of malfunction
- Perform a voltage test on the traction control input signal to determine if it is within the specified range
How to fix DTC P0859 on BMW
To fix DTC P0859 on a BMW, you can try the following solutions:
- Replace the faulty traction control switch
- Repair any damaged wiring or connections in the traction control system
- Replace the defective traction control module, if necessary
- Clear the fault codes and perform a test drive to ensure the issue has been resolved
How to erase DTC P0859 on BMW
To erase DTC P0859 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the system. Once the codes have been cleared, you can perform a test drive to verify that the issue has been resolved and the traction control system is functioning properly.
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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