Never heard of it before, but looking at my troubleshooting guide looks like it is a computer problem. Probably need a dealer/good mechanic... here ya go.

WHEN MONITORED
Ignition on.

SET CONDITION
The fuel volume message the PCM is receiving is implausible. The circuit is continuously monitored.

POSSIBLE CAUSES
CAN B open or shorted
Cluster module
Front control module
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Theory of Operation
The Front Control Module isn't receiving a fuel volume signal over CAN B from the Cluster Module. The FCM has to send the PCM a fuel volume signal over CAN C. The signal the FCM sends over CAN C is implausible.

DIAGNOSTIC TEST



1. ACTIVE DTC Ignition on, engine not running.
With a scan tool read DTCs.

Q: Is the DTC active at this time?

YES: Go To 2
NO: Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST.



2. CAN B BUS HARDWARE DTCS ALSO ACTIVE
With a scan tool check for DTCs in the FCM. Q: Are any CAN B Hardware related DTCs active at this time?

YES: (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the appropriate diagnostic procedures. Perform BODY VERIFICATION TEST - VER 1.
NO: Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST.