Code Definition

P0776 — Shift solenoid B stuck Off

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

About P0776

P0776 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.

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 P0776 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 P0776 is set when the transmission control module (TCM) or the engine control module (ECM) in vehicles with integrated control systems detects that shift solenoid 'B' is not functioning properly and is stuck in the 'off' position. This solenoid is a key component in managing the hydraulic fluid flow necessary for gear engagement and disengagement in the transmission. When solenoid 'B' is stuck off, it fails to activate as required, which can lead to transmission issues such as failure to shift into certain gears, delayed gear engagement, or irregular shifting patterns.

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