Final answer:
HD-OBD, compares the actual performance of vehicle systems and components to the expected performance, logging discrepancies as fault codes.
Therefore, the correct answer is: option A). HD-OBD (Heavy Duty On Board Diagnostics).
Step-by-step explanation:
The feature that compares system and component performance to expected performance is known as HD-OBD (Heavy Duty On Board Diagnostics).
HD-OBD is a system used in vehicles, particularly in heavy-duty vehicles, to monitor the performance of its emissions system and other related components.
Additionally, HD OBD regulations require manufacturers to self test production engines and submit data for each model year starting in 2010 demonstrating that the HD OBD system is able to detect malfunctions at the required malfunction criteria.
When a discrepancy is detected between actual and expected performance, the system logs a fault code that can be retrieved by a diagnostic tool.
This system is crucial for maintaining the efficiency and compliance with environmental regulations concerning vehicle emissions.