Code Definition

P1911 — Controller Area Network data bus fault

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Volkswagen

About P1911

P1911 is a manufacturer-specific powertrain diagnostic trouble code recorded for Volkswagen vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1911 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This fault code is set when the engine control module (ECM) detects a malfunction in the Controller Area Network (CAN) bus system. The CAN bus is responsible for communication between various control modules, including the ECM, transmission control module (TCM), ABS module, and other electronic systems. A failure in the CAN bus can result in loss of communication, warning lights, or improper system operation.

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