OBDII Evaporative System Integrity Testing Is Being Discussed

OBDII evaporative system integrity testing is being discussed. Technician A says the integrity check is done by creating a vacuum in the tank and measuring how well it holds the vacuum. Technician B says the fuel tank pressure (FTP) sensor is a transducer that converts the absolute pressure in the fuel tank into an input for the PCM. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Correct Answer:

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