Ignore the text "Undefined Fuel-Reserved for Proprietary" and look for the four or five-digit alphanumeric code associated with it (e.g., P1229 or P1602). 2. Use a Brand-Specific Database
These are unique to brands like Ford, Toyota, or BMW. undefined fuel-reserved for proprietary
Problems with how the car manages fuel vapors. Why Your Scanner Isn't Giving a Clear Answer Problems with how the car manages fuel vapors
If you have a professional-grade tool, it may simply need a firmware update to recognize newer proprietary codes from recent vehicle models. Steps to Resolve the Issue 1. Note the Numeric Code Note the Numeric Code If you’ve connected an
If you’ve connected an OBD-II scanner to your vehicle and encountered the message you are likely looking at a placeholder for a manufacturer-specific fault code. While it sounds like a cryptic warning about your gas tank, it is actually a technical communication gap between your car’s computer and your diagnostic tool. What Does the Error Actually Mean?