Technician A says that some emission-related DTCs will cause engine power derate to encourage a driver to have the emissions system repaired. Technician B says that most diesel engine OBD DTCs will derate engine power. Who is correct?
A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because certain emission-related Diagnostic Trouble Codes (DTCs) can trigger a power derate to prompt the driver to address the emissions issue. However, not all diesel engine OBD DTCs will result in a power derate, so Technician B is incorrect.

Technician a Says That Some Emission-Related DTCs Will Cause Engine