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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gauges >> Diagnostic Information and Procedures >> DTC P0462 (3.8L, 5.3L, 6.0L, 6.2L, 7.0L Engines) >> Circuit/System Testing (3.8L, 5.3L, 6.0L, 6.2L, 7.0L Engines)

Circuit/System Testing (3.8L, 5.3L, 6.0L, 6.2L, 7.0L Engines)

  1. Ignition OFF, disconnect the harness connector at the fuel level sensor.
  2. Ignition ON, verify that the scan tool Fuel Tank Level Remaining parameter display is less than 4 percent.
    • If greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the PCM.
  3. If all circuits test normal, test or replace the fuel level sensor.
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