Error Code P0520
Moderate Issue
DTC Code P0520 indicates a malfunction in the Engine Oil Pressure Sensor/Switch Circuit, where the signal from the sensor to the PCM is disrupted.
What symptoms indicate Error Code P0520?
- Engine Light ON: The check engine light or service engine soon warning light illuminates, indicating a potential issue with the engine oil pressure sensor or switch circuit.
- Oil Pressure Warning Light ON: The oil pressure warning light activates, suggesting a malfunction in the engine oil pressure sensor or switch circuit, which may lead to incorrect oil pressure readings.
What causes OBD code Error Code P0520?
- Low oil level or motor mechanical fault can lead to insufficient oil pressure, triggering the sensor.
- A faulty oil pressure sensor may provide incorrect readings, causing the error code.
- An open or shorted oil pressure sensor harness can disrupt the signal, leading to a malfunction.
- Poor electrical connection in the oil pressure sensor circuit can result in intermittent or incorrect sensor readings.
How to fix OBD code Error Code P0520?
- Verify DTC Code: Confirm the presence of DTC P0520 using an OBD-II scanner. Check for any additional related codes such as P0521, P0522, or P0523 that may provide further insight into the issue.
- Inspect Engine Oil Level and Condition: Ensure the engine oil level is within the recommended range and the oil is in good condition. Low or dirty oil can affect pressure readings.
- Examine Oil Pressure Sensor: Locate the engine oil pressure sensor and inspect it for any visible damage or loose connections. Ensure the sensor is properly mounted and connected.
- Check Wiring and Connectors: Inspect the wiring harness and connectors leading to the oil pressure sensor for any signs of damage, corrosion, or disconnection. Repair or replace as necessary.
- Test Oil Pressure Sensor: Using a multimeter, test the oil pressure sensor for proper resistance and voltage output. Compare the readings with manufacturer specifications to determine if the sensor is functioning correctly.
- Measure Actual Oil Pressure: Use a mechanical oil pressure gauge to measure the actual oil pressure. Compare the readings with the vehicle's specifications to ensure the oil pump and engine lubrication system are operating correctly.
- Review Engine Control Module (ECM): If all physical components are functioning correctly, consider the possibility of an ECM issue. Check for any software updates or reprogramming needs that may resolve the DTC.