P0520

Engine Oil Pressure Sensor/Switch A Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Check Engine Light Is On
Unstable engine operation
Power reduction
Engine noise due to insufficient oil pressure

Causes

Oil pressure sensor malfunction
Open or short circuit in wiring harness
Poor contact in the sensor connector
ECU malfunction

How to Fix

Check the oil level and condition
Inspect the wiring harness and sensor connectors
Check the resistance of the oil pressure sensor
Replace sensor if necessary
Clear the error code and check if it returns

Related codes

P0521 P0522 P0523