The B0001 fault code, applicable to all car manufacturers, means “Driver Frontal Stage 1 Deployment Control (Subfault)”.
The P0021 fault code, applicable to all car manufacturers, means “A Camshaft Position – Timing Over-Advanced or System Performance (Bank 2)”.
The P0020 fault code, applicable to all car manufacturers, means “A Camshaft Position Actuator Circuit/Open (Bank 2)”.
The P001F fault code, applicable to all car manufacturers, means “A Camshaft Profile Control Circuit High (Bank 2)”.
The P001E fault code, applicable to all car manufacturers, means “A Camshaft Profile Control Circuit Low (Bank 2)”.
The P001D fault code, applicable to all car manufacturers, means “A Camshaft Profile Control Circuit/Open (Bank 2)”.
The P001C fault code, applicable to all car manufacturers, means “A Camshaft Profile Control Circuit High (Bank 1)”.
The P001B fault code, applicable to all car manufacturers, means “A Camshaft Profile Control Circuit Low (Bank 1)”.