Erratic Fuel Gauge Readings, Fuel Gauge Reads Empty When There is Fuel in Tank, DTC P0463 or P2068 Set, Low Fuel Message Displayed in DIC (Reprogram ECM)

Some customers may comment that the fuel gauge is erratic or reads empty when there is fuel in the tank. Also, the driver information center may display the "Low Fuel" message.

Upon investigation, the technician may find either DTC P0463 or P2068 set.

This condition may be due to the fuel level sensor over-traveling its ink path. When this occurs, the fuel level sensor loses electrical contact and sends the fuel gauge to empty. As fuel is drawn out of the tank, the fuel level sensor re-establishes contact and the fuel system operates normally.

First confirm that DTC P0463 or P2068 have been set and that no other fuel-related codes exist. If other codes are present, follow published DTC diagnostics.

A new software has been developed that adds a buffer to the electronic circuit that waits before it sets a fuel message or drives the gauge to empty. Technicians are to reprogram the ECM with this updated software calibration. This new service calibration was released with TIS satellite data update version 11.5, available November 13, 2005. As always, make sure your Tech 2® is updated with the latest software version.

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