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Fuel Gauge Not Operating Properly

Possible Causes are:

Diagnose and repair any PCM or Communication DTCs before proceeding with this test. Perform the Instrument Cluster Self Test. The self test can be performed with the DRBIII(R) or manually using the following procedure: Turn ignition off. Press and hold the Trip Reset button. Turn ignition on. Observe the fuel gauge during the self test. The fuel gauge should position the indicator needle at the following calibration points: Empty, Stop, Empty, Half Full, and Full Stop. Did the fuel gauge position at the proper calibration points? If yes, diagnose and repair fuel level unit problem. See DTCs P0460-463 under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - GRAND CHEROKEE article in ENGINE PERFORMANCE. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, replace the instrument cluster. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.

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