Prior to erasing DTCs on an OBD II vehicle, a scan tool should be used to perform all of these tasks EXCEPT :
A)retrieve memory DTCs and related freeze frame data
B)retrieve fuel trim values
C)activate all active command modes
D)check monitor readiness status

Question

Quizplus · Accepted Answer

Activating all active command modes is not necessary before erasing DTCs. The other tasks help diagnose and understand the vehicle's condition before clearing codes.

Prior to Erasing DTCs on an OBD II Vehicle, a Scan