Code Definition

P1914 — Manually Shifted Automatic (MSA) Switch Circuit Malfunction

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

About P1914

P1914 is a manufacturer-specific powertrain diagnostic trouble code. 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 an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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

The P1914 fault code indicates that the Transmission Control Module (TCM) has detected a malfunction in the Manually Shifted Automatic (MSA) switch circuit. This switch is part of the manual shift mode system, allowing the driver to manually select gears in an automatic transmission. A circuit malfunction suggests an issue with the switch input, signal integrity, or wiring.

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