BMW DTC P1701 – Double Error Position Information CAN / Serial Line
DTC P1701 meaning on BMW
DTC P1701 on a BMW indicates a Double Error Position Information CAN / Serial Line fault. This fault code is related to communication issues within the vehicle’s network system, specifically involving the transmission control module (TCM) and the engine control module (ECM).
BMW DTC P1701 symptoms
Symptoms of DTC P1701 on a BMW may include erratic shifting behavior, transmission slipping, harsh shifting, or the transmission going into limp mode. Additionally, you may experience a check engine light illuminated on the dashboard.
BMW DTC P1701 causes
The causes of DTC P1701 on a BMW can vary, but common reasons include faulty wiring or connectors in the CAN or serial communication lines, a malfunctioning TCM or ECM, software issues, or a defective transmission position sensor.
BMW DTC P1701 seriousness
DTC P1701 should be addressed promptly as it can lead to drivability issues and potential transmission damage if left unresolved. Ignoring this fault code may result in further complications and costly repairs.
How to diagnose DTC P1701 on BMW
To diagnose DTC P1701 on a BMW, a professional diagnostic scan tool capable of reading BMW-specific fault codes is required. The technician will perform a thorough inspection of the transmission system, check for any loose or damaged wiring, and conduct tests on the TCM and ECM to pinpoint the exact cause of the fault.
How to fix DTC P1701 on BMW
Fixing DTC P1701 on a BMW may involve repairing or replacing any damaged wiring or connectors in the communication lines, addressing any issues with the TCM or ECM, updating software if necessary, or replacing the transmission position sensor if found faulty. It is recommended to follow the manufacturer’s repair procedures and use genuine BMW parts for a reliable fix.
How to erase DTC P1701 on BMW
Once the underlying issue causing DTC P1701 on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. The technician can access the vehicle’s onboard computer system and clear the fault code, resetting the check engine light in the process. It is important to ensure that the repair has been successful before clearing the fault code.
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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