![]() “There are probably a thousand or more on a typical Class 8 truck today. “Trucks a number of years ago maybe had a couple hundred fault codes,” says Mike Hasinec, vice president of maintenance for Penske Truck Leasing. It also should help you decide how quickly the warning needs to be addressed. If you don’t know, the simplest way to find out is to check the owner’s manual. “It’s extremely important to know what these different lights mean because of how many there are and what the combinations of certain lights can mean,” says David Perry, corporate technical trainer for Transervice. Still, their malfunctions are among the most common triggers of dashboard warning lamps. Truck and engine makers have made progress in stabilizing these emissions-related systems, says Jeff Rogers, a Ryder maintenance director. Other issues came with the selective catalytic reduction system introduced in 2010 model trucks. Owners of trucks newer than the 2007 model year have been subject to potential diesel particulate filter problems. Modern instrument clusters, such as this one illuminated during the ignition sequence in a 2019 Freightliner Cascadia, warn of problems with the engine, brakes, emissions systems and other components.Īdvancements in engine and emissions technology over the last decade have complicated the challenge of staying on top of dashboard warning lights. ![]() This story has been updated as of June 25, 2021, with information regarding potential warranty issues regarding driving with engine warning lamps on.
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