Helpful Automotive Resources
P0522 Code: Engine Oil Pressure Sensor/Switch “A” Circuit LowIn most applications, the engine oil pressure switch is a simple pressure switch that receives a reference voltage from the PCM. The pressure-sensing mechanism in the switch is in direct contact with the oil that circulates throughout the engine. This means that any changes in the oil pressure produce an P0520 Code: Engine Oil Pressure Sensor/Switch “A” CircuitHaving the correct oil pressure ensures that there’s a cushion of oil between the rotating internal engine components. The car’s computer or powertrain control module (PCM) monitors the oil pressure by sending a reference voltage to the engine oil pressure sensor. This sensor returns voltage output to the PCM, which P2646 Code: “A” Rocker Arm Actuator System Performance/Stuck Off (Bank 1)In vehicles equipped with VTEC, the rocker arm control solenoid supplies hydraulic pressure to the variable timing and lift mechanism. This allows the VTEC system to adjust valve timing and lift as needed. The VTEC system controls the rocker arm control solenoid through the powertrain control module (PCM).
P0521 Code: Engine Oil Pressure Sensor/Switch Range/PerformanceA vehicle’s oil pressure sensor detects and calculates the oil pressure of the engine. The information it obtains is sent to the PCM in the form of a voltage value or signal. The OBD-II code P0521 is triggered when the PCM perceives that the reading from the oil pressure sensor