Code Definition

P0994 — Transmission Fluid Pressure Sensor/Switch F Circuit Low

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0994

P0994 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0994 is stored, the module has detected a signal or supply voltage lower than the expected operating range; 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.

Because P0994 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The fault code P0994 is triggered when the Transmission Control Module (TCM) detects that the signal from the Transmission Fluid Pressure Sensor/Switch 'F' Circuit is lower than the expected range. This low voltage condition indicates that the fluid pressure in the transmission is below what is required for proper operation. This situation can occur due to various issues, often related to electrical or hydraulic problems within the transmission system.

Quick Facts