The error message " Your system date is wrong " in WinOLS typically occurs because the software detects a discrepancy between your computer's current date and the expected timeframe for its license or security checks. This is often seen with older or unofficial versions of the software that rely on specific date parameters to function.

1. unstable idle after 30 minutes of driving

   Some modified ECUs have been found where the only symptom of a wrong system date was — because WinOLS had incorrectly corrected a time‑based checksum region that the ECU recalculates every drive cycle.

   1. Correct system clock and timezone; restart WinOLS.
   2. Enable Windows time sync and resync:

      This error typically appears when launching WinOLS (a market-leading solution for engine mapping and chip tuning) or when trying to load a specific project file. It can be frustrating, locking you out of your work and interrupting vital tuning projects.

      • w32tm /resync
      1. Disable antivirus software: