The P0004 fault code applies to all car manufacturers and means “Fuel Volume Regulator Control Circuit High”.
The P0003 fault code, applicable to all car manufacturers, means “Fuel Volume Regulator Control Circuit Low”.
The P0001 fault code applies to all car manufacturers and means “Fuel Volume Regulator Control Circuit/Open”.
The P004A fault code, applicable to all car manufacturers, means “Turbocharger/Supercharger Boost Control B Circuit/Open”.

