Possible Causes And Corrective Actions

Open circuit or short circuit between sender for fuel gauge (G) and instrument cluster. Possible effect may be fuel reserve indicated value 0 ("empty"). Read Measuring Value Block. See READ MEASURING VALUE BLOCK (FUNCTION 08) . Locate malfunction using wiring diagram. See .INSTRUMENT CLUSTER in SYSTEM WIRING DIAGRAMS article under ELECTRICAL.
Sender for fuel gauge (G) malfunctioning. Locate malfunction using wiring diagram. See INSTRUMENT CLUSTER in SYSTEM WIRING DIAGRAMS article under ELECTRICAL. Replace sender for fuel gauge.