What does it mean when a truck Derates?
In general, a derate means that the car engine computer program is limiting the vehicle speed or power. It is designed to protect you from causing any engine or diesel particulate filter (DPF) damage.
What causes engine sudden stoppage?
Engines usually stop suddenly only if they suffer from a lack of fuel or sparks . A slower, spluttering halt, on the other hand, probably indicates fuel problems – ignition faults that cause similar poor running are unlikely to stop the engine in the short term.
What happens when engine Derates?
What is a DEF derate or an aftertreatment derate? A derate means that the program inside the engine computer limits either the power or vehicle speed. A derate is designed to protect you from causing engine or DPF damage.
What does yellow engine light mean on Freightliner?
A — Generally a yellow “Check Engine” light tells you that there is a problem that needs checked out. A red “Engine Shut Down” light means that there is a mission-disabling problem that needs attention right away. If the Engine Control Module is programmed to shut down it will do so.
Can you regen a truck while driving?
Your truck can undergo the regen process properly while running, and will in fact, usually do so. Your diesel particulate filter, or DPF, undergoes routine passive regen as needed during steady driving. Active regeneration also occurs and happens best during highway driving speeds.
How often should you regen your truck?
Active regeneration will be initiated every 300 miles or so depending on how you use your car and will take 5 to 10 minutes to complete. But it’s a problem if your journey’s too short and the regeneration doesn’t finish. During active regeneration you may notice: Cooling fans running.
What happens if you run out of DEF?
If the truck is allowed to run out of DEF the engine’s power is reduced, a solid red warning will be displayed and the vehicle speed will be limited to 5 mph until the DEF tank is refilled.
How far can you drive with DEF light on?
You should get around 3000 miles per tank DEF. Most DEF tanks require one gallon of DEF for every 50 gallons of diesel fuel, and one gallon will generally last between 300 to 500 miles.
What to do if your truck engine is derated?
If it will only lug along at 10 to 12 mph there is nothing you can do except to call your company shop and let them tell you what you are to do, which will probably involve a wrecker and tow job. It may be a good idea to call the shop anyway and let them know what it is doing.
How many mph can a derated engine go?
The scenario usually starts with the check engine lights coming on and I the info dial says the engine is derated. If it is seriously derated it will only go about 12 mph down the highway however
Why does my car stall on the highway?
If it stalls on the highway, you could be involved in a very serious accident. If your car stalls, check out the 6 most common reasons why, how to diagnose the problem and resolve it before you cause an accident. A bad battery is one of the most common reasons that cars stall. Most people think that if a battery is dead, the car won’t start.
Why is my Check Engine light still on after filling up?
The cap is a crucial part of a car’s fuel delivery system. It notably prevents gasoline fumes from leaving the fuel tank, and it helps keep the whole system under the correct pressure. If your check engine light turns on immediately after a fill-up, pull over and make sure the cap isn’t loose — or still on your car’s roof.