Code Definition

P0877 — Transmission Fluid Pressure Sensor/Switch D Circuit Low

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

About P0877

P0877 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 P0877 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 P0877 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 P0877 is triggered when the control module detects a low input signal from the Transmission Fluid Pressure Sensor/Switch 'D'. This low signal condition indicates that the sensor or switch is outputting a voltage lower than the normal operational range set by the manufacturer. A low signal can be indicative of various issues with the sensor/switch itself, its circuit, or an underlying problem that affects the transmission fluid pressure.

Quick Facts