Stage 1 and Eco tuning explained

What a Stage 1 file is

A Stage 1 file is a binary calibration that replaces the factory software in the ECU. It adjusts fuelling, boost and ignition or injection targets within the limits of the standard hardware.

No parts are changed. The file works with the injectors, turbo, intercooler and fuel system the car came with. That is why Stage 1 is the most common first step.

Results vary by engine, fuel, condition and supporting hardware, and no gain or outcome is guaranteed.

Stage 1 car

Pricing: Master file price €65 ex VAT · slave (Tier E) €39.

The Stage 1 car file is the standard performance calibration for petrol and diesel passenger cars. It targets more torque and smoother delivery across the rev range.

Send your original read, the exact ECU part number, the engine code and the fuel you normally use. A stock car with a clean service history gives the most predictable result.

• Keep the original read so the file can be checked against it.
• Fix any existing fault codes before flashing, such as a sensor or boost leak.
• Note any modification, including an air filter, exhaust or intercooler change.

Common codes

• P0299Turbocharger underboost condition. Boost pressure stayed below the target, so the ECU logs an underboost fault.
• P0237Turbocharger boost sensor A circuit low. The boost sensor signal is reading below its normal range, often a wiring or sensor fault.
• P0101Mass air flow sensor range or performance. The airflow reading is outside the range the ECU expects for the operating point.
• P0087Fuel rail or system pressure too low. Rail pressure fell below the value the ECU asked for.

Eco and economy tune, car

Pricing: Master file price €65 ex VAT · slave (Tier E) €39.

The Eco file trades some peak output for lower fuel consumption. It typically smooths throttle response, moves gear-shift and boost targets to lower-load points, and limits harder acceleration.

It suits drivers who mainly commute or cover long motorway distances. It is not a race calibration. If you want more power than stock, Stage 1 is the better choice.

Results vary by engine, fuel, condition and supporting hardware, and no gain or outcome is guaranteed.

Common codes

• P0101Mass air flow sensor range or performance. The airflow reading is outside the range the ECU expects for the operating point.
• P0237Turbocharger boost sensor A circuit low. The boost sensor signal is reading below its normal range, often a wiring or sensor fault.

Stage 1 for trucks and agricultural vehicles

Stage 1 is also supplied for supported truck and agricultural engines. The price is higher because heavy-duty ECUs and their calibrations are larger and more involved.

See the truck and agricultural guide for what to send and the variants available.

Common fault codes

Codes vary by make, model and ECU. Read the stored codes on your own car before and after flashing.

• P0299Turbocharger underboost condition. Boost pressure stayed below the target, so the ECU logs an underboost fault.
• P0237Turbocharger boost sensor A circuit low. The boost sensor signal is reading below its normal range, often a wiring or sensor fault.
• P0101Mass air flow sensor range or performance. The airflow reading is outside the range the ECU expects for the operating point.
• P0087Fuel rail or system pressure too low. Rail pressure fell below the value the ECU asked for.