What happens when diesel exhaust fluid runs low?
With the engine off, under the Next Oil Change heading, there’s a notation reading “DEF refill XXX miles.” We soon discovered that the earliest warning is fleeting and easy to miss. According to Land Rover, the first message—“Diesel exhaust fluid level low”—occurs at around 1500 miles before the no-restart doomsday.
What’s the max speed when exhaust fluid is empty?
“Exhaust Fluid Empty Refill Now – 55 MPH (89 km/h) Max Speed Next Restart” “Exhaust Fluid Empty Refill Now – 4 MPH (6 km/h) Max Speed Next Fuel Fill\ ,”Shut down the truck and allow ECM to power down (ign. key off, wait 2 minutes).
What is the speed limit on a silveradosierra?
The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously. Vehicle speed is limited to 89 km/h (55 mph).
What does speed limited on GMC Duramax mean?
200 miles down the road the “Speed Lmited to 55 mph at next Restart” message shows up. WTF, now I am pissed. I pull over, add DEF while running, and call a dealership 20 miles down road. I pull in to a parking lot next to dealer, shut truck off and unhook trailer. Start truck and get svc def and speed limited message.
What kind of exhaust fluid does a Silverado use?
Diesel Exhaust Fluid (DEF) helps reduce the amount of regulated emissions that are produced. 2020 Silverado and Sierra models equipped with LM2 or L5P diesel engines employ a new electronic DEF level gauge on the instrument cluster that indicates how much DEF remains in the tank.
What happens if your exhaust fluid is not replaced?
If poor-quality fluid is not replaced within 200 miles, the vehicle speed will be limited to 55 mph at the next vehicle start. If the system’s warnings continue to be ignored, vehicle speed will ultimately be limited to 4 mph in accordance with federal and state requirements.”
Why does my Silverado use so much Def?
As a result, drivers could have an initial impression that the vehicle consumes an excessive amount of DEF. A new electronic DEF gauge on 2020 Silverado and Sierra models estimates how much fluid remains in the tank. The amount of DEF consumed also is a function of how hard the engine is working, or engine load.
Why is my Def warning not clear on my GMC?
If the vehicle has been driven for a few miles, the ignition has been turned off (allowing the ECM to go to sleep for at least 5 minutes), and the DIC will not update, the message may have become latched into the ECM. There are three different reasons for a DEF (Diesel Exhaust Fluid) warning message to set.