Question # 1

A diesel truck derates with “high exhaust backpressure” code. What is the most likely cause?

Options:

A.

Clogged diesel particulate filter

B.

Faulty fuel regulator

C.

Glow plug fault

D.

MAP sensor

Viewing question 1 out of 75 questions
Industry research shows that students who utilize L2 practice tests are significantly more likely to pass exam.


Our free L2 practice questions act as a diagnostic tool to give you a clear snapshot of your Electronic Diesel Engine Diagnosis Specialist readiness. Discover which topics are your strengths and, more importantly, which critical topics require your immediate attention.