What requirement(s) is/are mandated by OBD II?
A) All manufacturers must redesign their engine control systems so as to operate identically in all respects and according to an EPA-designed engine control system.
B) The PCM must turn on the MIL if component and/or system inefficiency results in emission levels exceeding 1.5 times the FTP cut-point.
C) The PCM must turn on the MIL if component and/or system inefficiency results in emission levels exceeding two times the FTP cut-point.
D) Both A and C

Question

Quizplus · Accepted Answer

OBD II (On-Board Diagnostics II) mandates that the Powertrain Control Module (PCM) must illuminate the Malfunction Indicator Light (MIL) if a component or system inefficiency causes emissions to exceed 1.5 times the Federal Test Procedure (FTP) cut-point, not two times as stated in option C. There is no requirement for all manufacturers to redesign their engine control systems to operate identically or according to an EPA-designed system, as stated in option A.

What Requirement(s) Is/are Mandated by OBD II