What does code P1780 mean on BMW vehicles?
The ECU detects an error in torque reduction commands transmitted over the CAN network.
OBD-II Code BMW
P1780 — BMW — CAN Torque Reduction
The ECU detects an error in torque reduction commands transmitted over the CAN network.
Common symptoms
- Loss of power
- reduced engine response
Possible causes
- CAN network fault
- communication failure between modules
Initial recommendation
Diagnose CAN network and verify torque reduction signaling between control modules.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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