The P2796 code indicates an electrical open circuit within the control system for the electric auxiliary transmission fluid pump. This pump supplements hydraulic pressure in the transmission during specific operating conditions, such as engine start-stop events. When the control module detects a break in the circuit continuity, it stores this code and may limit transmission function.
The internal motor windings within the pump assembly can fail, creating an open circuit that prevents operation.
Wires leading to the transmission pump may become frayed, cut, or burned, interrupting electrical flow.
Moisture or contamination at the pump connector can cause high resistance or a complete loss of connection.
A protective fuse may blow due to a surge, or the control relay may fail to close the circuit.
Corrosion or looseness at the circuit ground point can prevent the pump from completing its electrical path.
Internal driver failure within the control module is possible but statistically rare compared to component failures.
Yes, it can lead to transmission damage due to insufficient hydraulic pressure during operation.
No, PCM failure is rare for this code; wiring and the pump itself are the usual causes.
It is not recommended, as transmission slipping may occur and cause further mechanical damage.
Yes, the system will likely disable engine stop-start functionality to maintain transmission pressure.