P3105 BMW, MINI: CYLINDER 2 HIGH-PRESSURE FUEL INJECTOR LOW-SIDE CIRCUIT, LOW
POST UPDATED IN February, 2023
P3105 BMW, MINI: CYLINDER 2 HIGH-PRESSURE FUEL INJECTOR LOW-SIDE CIRCUIT, LOW
From the solenoid-controlled injection valve, high-pressure fuel is delivered to the combustion chamber. This solenoid valve is defined by a retractable plunger, which is flexible in angle and shape, allowing the spray spread pattern to be varied. The discharge orifices are also provided with an injection pattern, thus ensuring uniform fuel distribution.
The function of controlling the injection valve is the solenoid, the retractable piston, a device that is permanently in charge of keeping the propagation properties stable, including the temperatures and pressures of the combustion chamber. The pressure at which the fuel is injected is around 50-200bar in the intake and compression stroke.
When the engine starts to warm up, small amounts of fuel are sent, seeking to get the catalytic converter to reach its operating temperature, and during cold starts, the fuel is sprayed in the compression stroke and through this, the starts are more efficient to the extent of decreasing fuel consumption and pollutant emissions.
When the P3105 OBDII fault code is set, it means that Digital Motor Electronics (DME) found a short ground in the fuel injector circuit corresponding to engine cylinder number 2.
The reasons why the P3105 OBD2 diagnostic code is set are:
The steps to follow to troubleshoot the DTC P3105 OBDII code are as follows: