You can find information about the P1520 fault code on this page.
BE WARNED! This particular code can mean a different thing depending on what make the car is, check below.
"Intake Manifold Changeover"
""B" Camshaft Position Actuator Bank 1"
"Alternator – FR terminal malfunction"
"Stop Lamp Switch Malfunction"
"Stop Lamp Switch Signal Malfunction."
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