Limp mode, also known as limp home mode, is a feature in all trucks, which activates once the vehicle’s ECU detects a fault. In trucks, this happens mostly due to a fault with emissions control system. So it may be a failure of one or more SCR system components, NOx sensors, DPF or anything else within the emissions control system. Once fault is detected, ECU will give you a certain number of hours/miles/starts before limp mode kicks in. When it does, the engine’s power will be limited until the fault in question is rectified.
Limp mode can be problematic, in most cases your truck will only go at a speed of about 20 miles per hour, such drastic is the engine’s power reduction. In trucks this can be especially bad if the vehicle is loaded at the time making it practically impossible to carry on driving safely.
There is not much you can do about limp mode when it is activated. The problem has to be fixed and relative error codes cleared before your truck will return to full power. However, something can be done. We are proud to present our Emergency Limp Mode reset tool, which will always get you out of trouble with limp mode. This is very simple plug & play tool which simply plugs in to the OBD port inside the cab. The way it works is the tool will automatically scan, detect and delete any inactive error codes from the truck’s ECU once plugged in, all you have to do is turn ignition on. Deleting the error codes will result in limp mode timer re-setting and giving you a new countdown until it kicks in again. Your vehicle will return to full power and if limp mode kicks in again after some time, you just reset it again. With SMART DTC emergency limp mode reset tool you will be able to complete your journey on full power no matter how far away you are from your destination.
We have developed a wide range of Limp Mode Reset tools for most European trucks. Full range, photos and specification can be found via link below: