Diagnostics & security
Checksum Correction
Correctly recalculating the checksum of a modified ECU file.
What is Checksum Correction?
ECU files contain checksums that verify integrity. When a file is modified these must be recalculated, otherwise the ECU may reject it. Our built-in PrimeChecksum engine does this automatically.
When is it needed?
- ECU rejecting the file after tuning
- Checksum error and failed write
- An edited file that will not load into the car
Benefits
- The file writes safely
- Automatic correction across 148 ECU families
- Built-in checksum support for dealers
Compatible vehicle types
Frequently asked questions
What is a checksum?
It is the mathematical signature the ECU uses to confirm a file is not corrupted. When a file is edited the signature must be recalculated, otherwise the unit refuses the file.
Can I bring my own file?
Yes. We can correct the checksum of your edited file; you remain responsible for its contents.
Can a wrong checksum damage the car?
A write that is interrupted or a file that was never verified can leave the ECU unusable. That is why we never skip the verification step.
How long does it take?
It depends on the file type; most files are done quickly, and if the structure is unsupported we tell you first.
Quick file quote
Tell us the machine — we reply on WhatsApp
Send the machine and ECU details in under a minute. Our Istanbul team checks the file options and replies with the next step.
- Original read checked before work
- Checksum corrected
- Support after delivery