My DAF has an engine management light in yellow which comes on when it starts to pull around 15000 revs when I ease off light goes out occasionally if I am heavy it flashes in red . I have checked filters , fuel pipes , inter cooler , intake pipes all ok . Truck pulls well nothing out of the ordinary happens when warning light flashes .
apart from getting the code read ,you may have a fuel pressure issue,system can't maintain fuel pressure when the engine is under load,check the fuel pick up pipe filter in the tank isn't clogged
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