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:

Remapping is a process of replacing/modifying manufacturer’s default/original settings/maps by downloading the original ECU file, modifying it and then uploading it back to the truck’s ECU. On some vehicles this can be done with OBD FLASH tools such as KESS, on others you would need to connect directly to the ECU using BENCH FLASH tool such as K-TAG.

Is remapping safe?

Remapping is safe as long as it is done by experienced and reputable company/person. Can Logic smart file service will not affect you engine’s reliability or anything else in the vehicle. Our remapping service comes with guaranteed results and full warranty.

Is remapping same as chipping/chip tuning?

Yes, remapping is also known as chipping, chip tuning and ECU tuning.  All of these are processes of installing, replacing or modifying manufacturers default software/maps in vehicle’s ECU.

Can remap be detected?

In most cases, no, remap would not be detected by diagnostics. Some details/changes may be seen, but not necessarily what exactly was changed.

Can you reverse remapping / Remove remap?

Yes, remap can be reversed to original state by uploading the original file on to the truck’s ECU. Can Logic remapping software is fully reversible and your truck can be returned to default settings at any time.

HGV remapping tools, what do I need to download/upload ECU files?

There are various different tools available on the market today. As well as original tools there are also many cheaper, Chinese made versions. Most popular tools used in today’s market are K-TAG (bench flash) and KESS (obd flash) these are made by Italian company Alientech. Chinese copies obviously sell at a fraction of the cost of original tool, but for top quality performance original tools would be recommended.

So basically, you will need a ‘flash’ tool, which is able to read, write, download and upload ECU files/maps on the vehicle you are working on. You will also need relative protocols/software, which would cover the vehicles you are planning to work on.  

Which trucks can you remap?

We are able to remap most Euro 5 and Euro 6 trucks as well as other heavy transport and machinery. Can Logic can remap most construction transport and plants, agricultural transport and plants, mining machines and a variety of other heavy transport/machinery. Do not hesitate to contact us with any questions in regards to your specific remapping needs.

Which remapping services do you provide?

We can offer a wide range of remapping services as well as bespoke maps tailored to your precise requirement. Our remapping services include, but are not limited to, the following:








Please get in touch to confirm possibilities. We will need to know some vehicle details like make, model, engine and ECU type, what tool are you using for downloading the file… Easiest way to request your truck-remapping quote is by filling out the form via link below:
Online File Modification

European emission standards for truck and other heavy-duty vehicle diesel engines are normally known as Euro I, Euro II, Euro III, Euro IV, Euro V and Euro VI. Starting with Euro 1 standard in 1992 the main aim was to reduce pollution and in turn improve air quality within the EU.

Euro I standard was introduced in 1992. Euro II standard followed in 1996. Both these standards were voluntary and were not enforced.

Euro III standard was introduced in 1999. This introduced a separate nitrogen oxide limit. 

Euro IV standard was introduced in 2005. 

Euro V standard was introduced in 2008

Euro VI standard started in 2013/2014

European emissions standards in trucks are the set limit of maximum values of harmful emissions that are allowed to come out of the exhaust. To fight pollution and for reasons such as health and air quality, the regulated emissions are:

  • Oxides of Nitrogen
  • Particulate Matter
  • Hydrocarbons
  • Carbon Monoxide
  • Ammonia

Euro 4 and Euro 5 standards have mainly concentrated on reducing particular matter and oxides of nitrogen emissions. These trucks would normally have emissions control system consisting of all or two of below components:

EGR (‘exhaust gas recirculation’ this will reduce Oxides of Nitrogen emissions by adding cooled exhaust gas to intake air)

SCR (‘selective catalytic reduction’ system, this will reduce Oxides of Nitrogen emissions by adding ammonia (adblue) to exhaust system)

NOX (‘oxides of nitrogen’ nox sensor removes oxygen and breaks down the nitrogen oxides to provide a reading, this reading is then sent to truck’s SCR system which can then adjust itself to reduce NOx levels)

Most common combination in Euro 5 trucks is SCR + two NOx sensors. 

Euro 6 is obviously is the most complex emission control system to date. Some manufacturers claim it offers a range of ecological advantages such as up to 99% reduction in particulate matter, up to 97% reduction in Oxides of Nitrogen and other emission reductions..  This comes at cost, Euro 6 SCR, Nox or DPF systems are extremely expensive to repair and unfortunately not as reliable as one would hope for.. Other potential downsides would be Euro 6 trucks will consume more adblue and some fleets have reported higher diesel consumption as well. To put it simply, Euro 6 trucks have the most stringent emissions control system to date, but this most certainly come at a price of much higher maintenance cost.

Euro 6 truck emissions system normally consists of three or all 4 components below:

EGR (‘exhaust gas recirculation’ this will reduce Oxides of Nitrogen emissions by adding cooled exhaust gas to intake air)

DPF (‘diesel particulate filter’, this will filter out soot particles from engine exhaust gas, when filter is full it will increase temperature to burn soot out, this process is known as ‘re-generation’)

SCR (‘selective catalytic reduction’ system, this will reduce Oxides of Nitrogen emissions by adding ammonia (adblue) to exhaust system)

NOX (‘oxides of nitrogen’ nox sensor removes oxygen and breaks down the nitrogen oxides to provide a reading, this reading is then sent to truck’s SCR system which can then adjust itself to reduce NOx levels)

So far Euro 6 is the latest and most advanced emission standard in trucks. Nobody is yet talking about Euro 7 standard, and no manufacturer has announced any dates as of yet. It is very hard to predict when will the new Euro 7 standard arrive or what will it be like..

nox_emulatorWhat is a NOx sensor?

A NOx (nitrogen oxide) sensor is a device that is used to analyse the emissions of a vehicle and determine the amount of nitrogen oxides being produced. It is typically placed before or after the catalyst in the SCR system to calculate if the emissions are at an appropriate level.

Euro 5 trucks usually have 1 NOx sensor. In some cases (such as DAF trucks or in all Euro 6 trucks, such as Volvo, Mercedes, Scania, IVECO, Renault, MAN) there would be 2 NOx sensors (one additional sensor before the SCR system) which would determine the amount of AdBlue needed to inject to have near-perfect NOx conversion.

What happens when the NOx sensor fails?

If a NOx sensor fails, the vehicle can have multiple faults on the dashboard which will cap the power of your truck (Limp mode). As NOx sensors are directly linked to the SCR system, there will also be emission and general SCR system faults, which only add onto the list of issues.

How to fix/prevent NOx faults?

Thankfully, fixing a NOx sensor is not that difficult, but can be expensive depending on the solution:

  • Replacing the NOx sensor
    • Around 500-1200 EUR will get you a new NOx sensor to replace the faulty one on your vehicle. While it is an ideal solution, you still run a risk of it happening in the future, meaning that there will be more money spent on repairs.
  • Purchasing a refurbished NOx sensor
    • Refurbished NOx sensors are very commonly found in garages, services and part shops. They are cheaper than new NOx sensors (around 1.5 times cheaper) and can serve just as well as a new one, though these typically do not have warranty included and they might not serve as long as new sensors. In the end they do not solve the main issue of reliability as well.
  • Installing a NOx emulator
    • NOx emulators are electronical devices which imitate a fully working NOx sensor. Usage and installation is quite simple – connect a few wires to the vehicle and you will have full imitation of the NOx sensor within your vehicle. Best thing? They are many times cheaper than NOx sensors and they can also be used with a faulty catalyst saving you a large amount of money otherwise spent on repairs.Our CanSmart NOx emulators are offered with 2 years of warranty and a 30-day refund guarantee, so you will not have to worry about the NOx sensor anymore. Visit our NOx emulator page for more info.

These are not all the solutions, but you can already see that the main concern for these solutions would be budget and reliability.

We can always advise on the best solution for you – contact us to have a conversation with our friendly support staff.