Code Definition

P1913 — Pressure Switch A Circuit Malfunction

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

About P1913

P1913 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 P1913 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.

P1913 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 P1913 fault code indicates that the Transmission Control Module (TCM) has detected a malfunction in the circuit for Pressure Switch A. Pressure switches are used to monitor hydraulic pressure in specific transmission circuits, providing feedback to the TCM for proper shift control. A circuit malfunction suggests that the signal from Pressure Switch A is out of the expected range, inconsistent, or missing.

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