Code Definition

P1914 — Brake servo pressure sensor out of range

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

About P1914

P1914 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.

When P1914 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

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.

P1914 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) or brake system control module detects that the brake servo pressure sensor is providing a signal that is outside the expected range. The brake servo pressure sensor monitors the vacuum or hydraulic pressure in the brake booster to ensure proper braking assistance. An out-of-range signal may indicate a sensor malfunction, pressure loss, or wiring issue, potentially affecting braking performance.

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