You Are Determining the Root Cause of an Older DPF

Multiple Choice

You are determining the root cause of an older DPF that has failed because it emits continual black smoke under load but has logged no fault codes. Technician A says the seals in the turbocharger could be leaking and should be inspected. Technician B says that this can be caused by abnormally high engine temperatures so the cooling system should be checked. Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B