Truck Tuning & HGV Remapping
Specialist ECU calibration for heavy commercial vehicles. We use dealer-level diagnostic equipment to read your truck's live operating data before writing a single byte — no generic files, no guesswork.
ECUFLASH has been programming commercial vehicle ECUs since 2004. Our workshop is in Doncaster; we also offer a full remote programming service anywhere in the UK.
What Truck Remapping Achieves
Commercial truck engines leave the factory calibrated conservatively — to accommodate the broadest possible range of fuel quality, altitude, ambient temperature, and operator variability. That conservatism means factory torque figures are not the limit of what the hardware can safely produce.
A professional ECU remap adjusts the injection timing, fuelling quantity, boost pressure targets, and torque maps within safe parameters for the specific engine variant and its condition. The result is an engine that works more efficiently across its operating range — not one that is simply pushed harder.
Increased Torque
More pulling power at lower RPM means less gear shifting — particularly valuable for heavy haulage and hilly routes.
Fuel Economy
Optimised injection timing and rail pressure allow the engine to do the same work on less fuel. Economy remaps focus entirely on this outcome.
Drivability
Flat spots and hesitation are removed. Smoother power delivery reduces driver fatigue and improves gear selection on automated gearboxes.
Dealer-Level Tools
We read the live system before programming. DAF DAVIE, Scania SDP3, Volvo PTT, MAN-cats III — the same tools as franchised dealers.
Euro 5 & Euro 6 — Fully Supported
ECUFLASH works with both Euro 5 and Euro 6 heavy trucks across all supported manufacturers. Euro 6 vehicles carry additional aftertreatment systems — SCR (selective catalytic reduction), DPF, and in some cases EGR — that must be fully diagnosed and understood before any calibration work is carried out.
We use manufacturer diagnostic software to read live NOx sensor data, DPF soot loading, and EGR operation before programming. This ensures calibration is based on the actual state of the vehicle, not assumptions. Diagnosis establishes the relevant system condition first; any subsequent work is considered against the vehicle’s use, specification and technical suitability.
Supported Manufacturers
Select your truck manufacturer for specific engine coverage, diagnostic tools, and services.
Fleet & Economy Calibrations
For fleet operators, we calibrate vehicles specifically for fuel economy rather than outright power. An economy remap adjusts injection timing, rail pressure, and torque curves to allow the engine to operate at lower RPM for the same road speed — using less fuel to maintain pace rather than achieving peak power figures.
The gains vary by vehicle, route type, and how the vehicle is driven. Motorway-heavy duty cycles typically see the most consistent results. We do not quote fixed percentage figures — every vehicle and fleet operation is different.
We offer multi-vehicle fleet pricing. Contact us with your fleet composition and requirements.
Fuel Economy RemappingOBD, Bench & Remote Programming
Most commercial truck ECU work is done via OBD (On-Board Diagnostics) connection through the vehicle's standard diagnostic port — the same access point used by dealer technicians. Some ECU types require bench programming where the ECU is removed and connected directly to our equipment.
For trucks that cannot travel to our Doncaster workshop, we offer a Remote Programming Service. We ship a compatible interface to your site. Your driver connects it; our engineers perform the full programming session remotely.
Quick Check
Check Your Truck's Options
Enter your truck's registration to see available tuning, AdBlue, and programming options.
Truck Tuning — Frequently Asked Questions
Does truck ECU remapping affect the warranty?
Most heavy commercial vehicles in daily haulage are operated beyond their original warranty period before any remapping is considered. For newer vehicles, this is a decision for the operator. ECUFLASH retains the original calibration file and can restore factory settings at any time.
Is remote truck tuning available?
Yes. ECUFLASH ships a compatible diagnostic interface to your site. Our engineers connect remotely via secure desktop session and perform the full programming procedure live on your vehicle, without it leaving your yard. See our Remote Programming service for full details.
What diagnostic equipment do you use?
We use genuine manufacturer diagnostic tools: DAF DAVIE, Scania SDP3, Volvo Premium Tech Tool with VOCOM II, MAN-cats III, Mercedes-Benz Xentry with SD Connect, Renault Trucks PTT, and Iveco EASY. These are the same systems used by franchised dealer technicians, not generic OBD readers.
Can you tune Euro 6 trucks?
Yes. ECUFLASH works with Euro 5 and Euro 6 trucks across all supported manufacturers. Euro 6 aftertreatment systems (SCR, DPF and EGR) are read and verified before any calibration work begins. Requests involving these systems are assessed against the vehicle’s specification, use and diagnostic findings before any work is discussed.
Do you offer fleet pricing?
Yes. Contact us with details of your fleet size, vehicle makes, and your primary objective (fuel savings, power, or both) and we will discuss multi-vehicle pricing.
Fleet Operators
We offer bespoke calibration programmes for entire fleets — economy-focused, performance-focused, or a combination. Multiple vehicles, prioritised scheduling, and mobile service for large fleets. Contact us to discuss requirements.