Often, this state is normal during specifically scheduled operations. If it appears unexpectedly, it could indicate a malfunction in the sensor system or a failure in the dual-fuel management system.
Based on our analysis, we recommend:
: The retailer's POS installer may have mapped a common fuel (like Diesel or Unleaded) to a proprietary slot by mistake. Because these are "proprietary," the fleet card issuer (like WEX or Voyager ) may not recognize what is being purchased, leading to a declined transaction. undefined fuel-reserved for proprietary
For now, however, "Undefined Fuel-Reserved for Proprietary" remains a unique fixture of the industrial age—a reminder that in a world driven by data, some answers are still locked away, even as we rely on them to keep our engines running.
However, there are also potential drawbacks to the increasing use of proprietary fuels. These include: Often, this state is normal during specifically scheduled
High-blend biodiesel (such as B20 or B100) and renewable diesel Liquefied Natural Gas (LNG) or Compressed Natural Gas (CNG) Proprietary hydrogen fuel cell recharges WEX - NACS CODE - Squarespace
. It serves as a placeholder or "reserved" data field within a standardized communication protocol (such as those used by Gilbarco Veeder-Root Because these are "proprietary," the fleet card issuer
If you encounter this classification in a fuel system manual (such as the Verifone Commander or OPW System2):
When a fleet manager reviews a transaction report, an unrecognized code might default to this "Undefined" label if the backend hasn't been configured to recognize a specific brand's proprietary fuel blend. The Role of PCATS and Standard Codes
To help you with the specific or troubleshooting of your fuel system: