Code Definition

P1912 — VFS C Pressure Output Failed Low

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

About P1912

P1912 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 P1912 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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.

P1912 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 P1912 fault code indicates that the Transmission Control Module (TCM) has detected that the pressure output from Variable Force Solenoid (VFS) C is lower than the expected range. VFS solenoids regulate hydraulic pressure for proper transmission operation, ensuring smooth shifts and clutch engagement. A 'failed low' condition means the solenoid is not providing adequate pressure, which may result in harsh shifting, slipping, or improper gear engagement.

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