SOFTWARE SOLUTION
CVN Fix
After a software modification, the Calibration Verification Number (CVN) no longer matches the original calibration. We restore consistent checksums — cleanly and model-specifically.
Modern engine control units store checksums (CVN / CAL-ID) that diagnostic testers use to verify the integrity of the calibration. After map modifications, many vehicles therefore report deviating CVN values.
Our CVN fix restores consistency between the calibration data and the stored checksums — for coherent diagnostic processes on motorsport and export vehicles.
Model-specific calculation
CVN/CAL-ID are correctly recalculated and stored for your control unit.
All common platforms
Bosch, Continental, Delphi, Siemens/VDO — we support the widespread ECU families.
Combinable
On request, done directly together with your software optimization in a single session.
// FAQ
Common questions
LEGAL NOTICE
The CVN adjustment serves the technical consistency of control unit software after modifications and is offered solely for export vehicles and motorsport vehicles used off public roads. Using it to deceive official inspections (e.g. the German HU/AU roadworthiness and emissions tests) within the scope of the StVZO is prohibited.
// CONTACT
Let's talk about your vehicle.
A short description is enough — you get an honest assessment and a clear price.