When a highway diesel engine DEF warning strategy defaults to trimback mode, what should be done?
A) regenerate the DPF
B) drive in a lower gear
C) replace the engine air filter
D) replenish the DEF tank

Question

Quizplus · Accepted Answer

Trimback mode in a highway diesel engine indicates an issue with the Diesel Exhaust Fluid (DEF) system, typically due to low DEF levels. The correct action is to replenish the DEF tank to ensure proper functioning of the engine's emissions control system.

When a Highway Diesel Engine DEF Warning Strategy Defaults to Trimback