P0521 - ENGINE OIL PRESSURE SENSOR/SWITCH RANGE/PERFORMANCE

The Powertrain Control Module (PCM) controls the Oil Pressure Sensor (OPS) which is responsible for detecting the amount of oil pressure in the engine and relays, reading, or giving a voltage value to the Powertrain Control Module (PCM).

The value of the oil pressure is usually transmitted to an indicator on the dashboard so that the driver can observe the oil pressure. In others, the indicator may not be present, but there will be a signal such as a light which will give a warning in case of problems with the oil pressure.

This diagnostic code is activated when the PCM observes that the value obtained by the Oil Pressure Sensor (OPS) is outside the expected level. Perhaps, the value is fixed when it should be changing or is out of the norm. DTC code P0521 OBD2 is set probably due to an electrical problem.

• Check Engine light on.
• On the oil pressure gauge, we can see that it is high.

The establishment of DTC P0521 OBD2 indicates that one of the following problems has occurred:

• The engine oil level may be low.
• The oil may be dirty due to a delayed oil change.
• The oil pressure is low.
• Cables or connectors in the Oil Pressure Sensor (OPS) circuit may be defective, this creates a bad electrical connection.
• The OPS sensor may be defective.

To solve a fault code P0521, you can do the following:

• First of all, you must check the oil level, it must have the necessary oil. You can also check the oil filter for leaks. Low oil pressure can be caused by an oil leak. Repair if you find any leaks. You should also make sure that the oil filter is properly adjusted.
• Check the cable and connectors leading to the Oil Pressure Sensor (OPS). Make sure there are no worn or broken wires. Replace one of these components if you find any inconsistencies.
• Using a digital meter, check the OPS sensor and compare the readings obtained with the manufacturer's specifications. If they don't match, you can replace the Oil Pressure Sensor (OPS).