BMW DTC U1807 – Hybrid/EV Powertrain Control Module Lost Communication With HIM (Hybrid Interface Module) via HS-CAN
DTC U1807 meaning on BMW
The Diagnostic Trouble Code (DTC) U1807 on a BMW indicates that there has been a loss of communication between the Hybrid/EV Powertrain Control Module and the Hybrid Interface Module (HIM) via the High-Speed Controller Area Network (HS-CAN) bus.
BMW DTC U1807 symptoms
Symptoms of the DTC U1807 on a BMW may include:
- Check Engine Light (MIL) illuminated
- Hybrid/EV system may not operate correctly
- Loss of power or performance issues
- Other related warning lights on the instrument cluster
BMW DTC U1807 causes
The DTC U1807 on a BMW can be caused by various factors, including:
- Faulty Hybrid Interface Module (HIM)
- Wiring or connection issues between the Powertrain Control Module and HIM
- Communication bus faults
- Software glitches or malfunctions
BMW DTC U1807 seriousness
The DTC U1807 should be addressed promptly as it can affect the proper functioning of the hybrid/EV powertrain system in the BMW. Ignoring this code may lead to further complications and potential drivability issues.
How to diagnose DTC U1807 on BMW
To diagnose the DTC U1807 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the wiring and connections between the Powertrain Control Module and the Hybrid Interface Module
- Check for any visible signs of damage or corrosion
- Perform a communication system test to identify any bus faults
- Verify the software versions and update if necessary
How to fix DTC U1807 on BMW
To fix the DTC U1807 on a BMW, the following steps may be taken:
- Repair or replace any damaged wiring or connectors
- Address any communication bus faults by repairing or replacing the affected components
- If the Hybrid Interface Module is faulty, it may need to be replaced
- Update the software to the latest version
- Clear the fault codes and perform a test drive to ensure the issue has been resolved
How to erase DTC U1807 on BMW
To erase the DTC U1807 on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes from the vehicle’s memory. After the repair has been completed and the underlying issue has been resolved, the fault codes can be cleared to reset the Check Engine Light and other related warning lights.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.