When a DTC is set, the PCM also stores the operating parameters of the emission control system at the time of the event in a data program called:
A) freeze frame
B) system readiness monitor
C) diagnostic trouble code
D) none of the above

Question

Quizplus · Accepted Answer

When a Diagnostic Trouble Code (DTC) is set, the Powertrain Control Module (PCM) stores the operating parameters of the emission control system at the time of the event in a data program called "freeze frame." This allows for later diagnosis of what the vehicle was doing when the fault occurred.

When a DTC Is Set, the PCM Also Stores the Operating