Last Updated on December 8, 2022 by tawhid

If you have an engine derate, it means that your truck’s engine is not performing at its fullest potential. There are a few things you can do to clear the derate and get your truck back to running like new. First, check all of your fluid levels and make sure they are topped off.

Next, clean or replace your air filter. If those two things don’t fix the problem, then you may need to take your truck into a shop for further diagnosis.

  • Check for any engine faults that may be causing the derate condition
  • Clear any faults that are found
  • Reset the engine derate condition by cycling the power or using the appropriate button on the control panel

How to Clear Engine Derate Cummins

If you have a Cummins diesel engine, you may have noticed that it goes into what’s called “derate” mode when the outside temperature gets too hot. Derate mode is when the engine reduces its power output to prevent damage from overheating. This can be really frustrating if you’re trying to get somewhere and your engine is suddenly running slower than usual.

But don’t worry, there are ways to clear derate mode and get your engine back up to full power. To start, you’ll need to connect a laptop with an internet connection to the diagnostic port under the dash of your truck. Once connected, open up Internet Explorer and go to

On this website, you’ll be able to enter your truck’s information and download the software needed to clear derate mode. Once you have the software downloaded, open it up and click on the “Clear Derate” button. The process usually takes less than a minute, and once it’s done your engine will be back up to full power.

So next time your Cummins diesel goes into derate mode, don’t panic – just follow these steps and you’ll be back on the road in no time!

How to Clear Engine Derate


What Causes an Engine to Derate?

An engine derate can have many causes. The most common cause is overheating due to a loss of coolant, but it can also be caused by a loss of oil pressure, an excessive build-up of carbon deposits, or a faulty sensor.

What Does Engine Power Derate Mean?

An engine power derate is a reduction in the amount of power that an engine can produce. This can be caused by a number of factors, including high temperatures, low air pressure, and high altitudes. A derate can also be voluntary, such as when an aircraft manufacturer decides to reduce the power output of an engine to improve its fuel efficiency.

What Happens When Your Truck Derate?

When your truck derates, it means that the engine is no longer able to produce its full power. This can happen for a number of reasons, but the most common cause is overheating. When the engine gets too hot, it starts to lose power and eventually will shut down completely to prevent damage.

Other causes of derating can include low fuel pressure, high exhaust gas temperatures, or a problem with the turbocharger. If you’re not sure what’s causing your truck to derate, the best thing to do is take it to a mechanic or diesel specialist who can diagnose the problem and get your truck back up and running at full power.

What Changes are Done While Derating the Engine?

An engine derate is a reduction in the maximum power an engine can produce. The reasons for this are typically to extend the life of the engine or to improve fuel economy. When an engine is derated, its fuel flow and air intake are reduced, which in turn reduces the amount of power it can generate.

This may also lead to a reduction in speed and torque.

How to clear DPF Regan Full Engine Derate code. MUST WATCH till end


If you’re noticing your engine derate more often, it might be time to clear it. Here’s a step-by-step guide on how to clear engine derate: 1. Start by checking for any error codes that might be causing the issue.

You can do this using a code reader or by consulting your vehicle’s diagnostic system. 2. Once you’ve identified the error codes, take note of them and look up what they mean. This will help you troubleshoot the problem and figure out how to fix it.

3. Next, reset the engine derate system by disconnecting the battery for 30 seconds and then reconnecting it. This will clear any stored codes and allow the system to start fresh. 4. Finally, drive your vehicle around for a while and see if the engine derate keeps happening.

Leave a Reply

Your email address will not be published. Required fields are marked *