A sudden power loss from a turbocharged and after cooled diesel engine is an indication of a/an __________.

Correct Answer: Option A — turbocharger malfunction or failure

A sudden drop in power on a turbocharged diesel stems from a failure in air delivery. Turbocharger mechanical binding, turbine blade destruction, or severe air-side restrictions halt boost pressure, starving cylinders of the required mass flow of air necessary for complete combustion.