What does Error Code P0520 mean?
Moderate Issue
DTC Code P0520 indicates a malfunction in the Engine Oil Pressure Sensor/Switch Circuit, where the signal from the oil pressure sensor to the PCM is disrupted.
What are the symptoms of 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 Error Code P0520?
- Low oil level or motor mechanical fault can lead to incorrect oil pressure readings, triggering the P0520 code.
- A faulty oil pressure sensor may provide inaccurate data to the engine control module, causing a malfunction alert.
- An open or shorted oil pressure sensor harness can disrupt the signal transmission, resulting in a circuit malfunction.
- Poor electrical connections in the oil pressure sensor circuit can cause intermittent or incorrect signals, leading to the error code.
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How to fix 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 oil levels or degraded oil can affect pressure readings.
- Examine Oil Pressure Sensor/Switch: Visually inspect the oil pressure sensor/switch for any signs of damage, corrosion, or loose connections. Ensure the wiring harness is intact and properly connected.
- Test Oil Pressure Sensor/Switch: Use a multimeter to test the oil pressure sensor/switch for proper resistance and voltage. Compare the readings with manufacturer specifications to determine if the sensor is functioning correctly.
- Check Engine Oil Pressure: Manually check the engine oil pressure using a mechanical gauge to verify if the pressure is within the manufacturer's specified range. This helps determine if the issue is with the sensor or the actual oil pressure.
- Inspect Wiring and Connectors: Thoroughly inspect the wiring and connectors associated with the oil pressure sensor for any signs of wear, damage, or corrosion. Repair or replace as necessary.
- Review Engine Control Module (ECM): If all physical components are in good condition, consider reviewing the ECM for any software updates or malfunctions that could affect sensor readings.