Technician A says that when the MIL is on, the technician should retrieve the DTC and follow the manufacturer's recommended procedure to find the root cause of the problem. Technician B says that all OBD II monitors must have the enable criteria achieved before a test is performed. Who is right?

Technician A

Explanation:

A check engine light or malfunction indicator lamp (MIL), is a tell-tale that a computerized engine-management system uses to indicate a malfunction.

Diagnostic Trouble Codes is a computerized engine control system can up to a certain point self-diagnose to detect auto problems that could be affecting your vehicle's emissions and engine performance.

Hence, since the DTC detects an engine problem, the positive course of action will be to retrieve the DTC and follow the manufacturer's recommended procedure to find the root cause of the problem.