Technician A says that once the DEF (diesel exhaust fluid) level becomes critical, vehicle speed will be limited. Technician B says that low DEF level display may be accompanied by a chime or voice message. Who is right?

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. When the DEF level becomes critically low, many vehicles will limit speed to encourage refilling. Additionally, a low DEF level is often indicated by a warning light, chime, or voice message to alert the driver.

Technician a Says That Once the DEF (Diesel Exhaust Fluid)