BMW DTC P1599 – CAN Timeout Message 2 Transmission Control Module
DTC P1599 meaning on BMW
DTC P1599 on a BMW refers to a CAN Timeout Message 2 Transmission Control Module fault. This diagnostic trouble code indicates a communication error between the Transmission Control Module (TCM) and other modules on the Controller Area Network (CAN) bus.
BMW DTC P1599 symptoms
Symptoms of DTC P1599 on a BMW may include transmission shifting issues, hesitation or jerking during acceleration, illuminated warning lights on the dashboard such as the transmission or check engine light, and in some cases, the vehicle may go into limp mode.
BMW DTC P1599 causes
The most common causes of DTC P1599 on a BMW include faulty wiring or connectors in the CAN bus network, a malfunctioning Transmission Control Module (TCM), software glitches, or a problem with other control modules communicating with the TCM.
BMW DTC P1599 seriousness
While DTC P1599 is not a critical fault that poses an immediate safety risk, it can lead to drivability issues and potential damage to the transmission if left unresolved. It is recommended to address this fault promptly to prevent further complications.
How to diagnose DTC P1599 on BMW
To diagnose DTC P1599 on a BMW, a diagnostic scan tool capable of reading BMW specific fault codes is required. The technician will need to retrieve the fault code, perform a visual inspection of the wiring and connectors in the CAN bus network, and conduct further testing to pinpoint the exact cause of the communication error.
Additional diagnostic steps may include checking for software updates, performing continuity tests on the wiring harness, and verifying proper communication between the TCM and other modules using a diagnostic tool.
How to fix DTC P1599 on BMW
Fixing DTC P1599 on a BMW typically involves addressing the root cause of the communication error. This may include repairing or replacing damaged wiring or connectors in the CAN bus network, updating software in the affected modules, or replacing a faulty Transmission Control Module (TCM) if necessary.
How to erase DTC P1599 on BMW
Once the underlying issue causing DTC P1599 on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. The technician can access the fault code menu, select the option to clear the code, and confirm the deletion. After clearing the code, it is recommended to test drive the vehicle to ensure the fault does not return.
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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