What is the typical action required if a vehicle's OBDII system has not completed all readiness monitors?

The typical action required when a vehicle's OBDII system has not completed all readiness monitors is to drive the vehicle under typical operating conditions until those readiness monitors reset. This process is essential because readiness monitors are designed to check the performance of various emissions-related components and systems after a vehicle's OBDII system has been cleared or reset.

Driving the vehicle allows the onboard diagnostic system to collect data from various sensors and complete the necessary tests. Each component's monitor must go through specific driving cycles, which may include a combination of idle time, acceleration, and deceleration under different conditions to confirm that the system functions properly. Only after all applicable monitors have successfully run and reported "ready" will the vehicle be in a condition suitable for a smog check.

This process highlights the importance of proper vehicle operation in maintaining compliance with emissions regulations, ensuring that the vehicle is not only operational but also adhering to environmental standards. Resetting the OBDII system without driving or immediate service without addressing the readiness monitors would not facilitate the completion of the necessary diagnostics required for compliance.