Undefined Fuel-reserved — For Proprietary [new]

If you want to clear this specific message from your diagnostic log, let me know:

Understanding "Undefined Fuel-Reserved for Proprietary": A Guide to Diagnostic Errors undefined fuel-reserved for proprietary

Most vehicles have a two-stage fuel warning: If you want to clear this specific message

However, there are also potential drawbacks to the increasing use of proprietary fuels. These include: undefined fuel-reserved for proprietary

The card used (e.g., WEX or Voyager) is restricted to certain fuel types, and the dispenser is signaling a code reserved for "Proprietary Use" that the network has not authorized for this specific account.

These codes are intentionally left open for specific fuel providers or private fleets to define for their own unique products. Why "Proprietary" is Used