Note: The following article is a best-effort reference for our customers and is provided "as-is" without any express or implied warranty. does not provide detailed troubleshooting as these are potentially complex tuner problems, not unlocking ones. Please proceed at your own risk.

There are many scenarios in which the SD card does not have the required tune files, especially Ford Power Strokes (see

However, this particular error is an indication the vehicle you are trying to tune has previously been tuned with a Spartan brand tuner. Unfortunately, this tuner overwrites the stock ECM/TCM files with custom values and can not be recognized by the H&S Brand Tuners. In order to use your Mini Maxx or XRT Pro, you must have the vehicle re-flashed back to OEM by a dealership or your mechanic shop.