P0520 Fault Code

Engine Oil Pressure Sensor/Switch Circuit Malfunction

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0520 fault code indicates a malfunction in the engine oil pressure sensor or switch circuit. This code signifies that the engine control module (ECM) has detected an abnormal reading from the oil pressure sensor, which can affect engine lubrication and performance. Proper oil pressure is crucial for engine health, and any malfunction can lead to serious issues.

What are the symptoms of the P0520 code?

• Engine oil pressure warning light is illuminated on the dashboard
• Unusual engine noises due to poor lubrication
• Decreased engine performance or efficiency
• Oil leaks, if related to a faulty sensor or switch
• Error code present during diagnostic testing

What causes the P0520 code?

• Faulty oil pressure sensor
• Wiring issues in the sensor circuit
• Poor connections or corrosion at the sensor terminals
• Oil level being too low or contaminated
• Malfunctioning engine control module (ECM)

How to fix P0520?

• Inspect the oil level and top up if necessary
• Replace the oil pressure sensor if faulty
• Check wiring and connections for damage, and repair if needed
• Clear the fault code and perform a test drive to confirm resolution
• If the problem persists, further diagnosis of the ECM may be required