BMW DTC P1E4D – Drive Motor ‘B’ Inverter Transistor Power Supply Circuit Low
DTC P1E4D meaning on BMW
DTC P1E4D on a BMW indicates an issue with the Drive Motor ‘B’ Inverter Transistor Power Supply Circuit being detected as low. This fault code is specific to the electric drive system of the vehicle.
BMW DTC P1E4D symptoms
Symptoms of DTC P1E4D on a BMW may include reduced power output from the drive motor, poor acceleration, and potential illumination of the check engine light or hybrid system warning light on the dashboard.
BMW DTC P1E4D causes
The causes of DTC P1E4D on a BMW can vary, but common reasons include issues with the drive motor inverter, damaged wiring or connectors in the power supply circuit, or a malfunctioning drive motor ‘B’ inverter transistor.
BMW DTC P1E4D seriousness
The seriousness of DTC P1E4D on a BMW should not be ignored, as it can affect the performance and drivability of the vehicle. Continuing to drive with this fault unresolved may lead to further damage to the electric drive system components.
How to diagnose DTC P1E4D on BMW
To diagnose DTC P1E4D on a BMW, a comprehensive scan tool capable of reading manufacturer-specific fault codes is required. The technician will need to inspect the drive motor ‘B’ inverter, associated wiring, and connectors for any visible damage or loose connections.
Additionally, performing a detailed electrical test on the drive motor ‘B’ inverter transistor and power supply circuit can help pinpoint the exact cause of the fault code.
How to fix DTC P1E4D on BMW
Fixing DTC P1E4D on a BMW may involve repairing or replacing the drive motor ‘B’ inverter, addressing any damaged wiring or connectors in the power supply circuit, or replacing the faulty drive motor ‘B’ inverter transistor.
It is recommended to follow the manufacturer’s diagnostic and repair procedures outlined in the service manual to ensure a proper fix for this fault code.
How to erase DTC P1E4D on BMW
Once the underlying issue causing DTC P1E4D on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. By clearing the code, the check engine light or hybrid system warning light should turn off, indicating that the fault has been addressed.
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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