While discussing OBD II systems: Technician A says if a misfire condition threatens engine or catalyst damage, the PCM flashes the MIL. Technician B says the PCM illuminates the MIL if a defect causes emission levels to exceed 1.5 times the emission standards for that model year. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Question

Quizplus · Accepted Answer

Both statements are correct. Technician A is correct because the Powertrain Control Module (PCM) will flash the Malfunction Indicator Light (MIL) to alert the driver of a misfire condition that could potentially damage the engine or the catalytic converter. Technician B is also correct because the PCM will illuminate the MIL if it detects a defect causing the vehicle's emissions to exceed 1.5 times the federal emission standards for that model year.

While Discussing OBD II Systems: Technician a Says If a Misfire