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Home >> Pontiac >> 2000 >> Firebird Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0461: Fuel Level Sensor Circuit Performance ("F" Body) >> Diagnostic Procedures
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Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Disconnect fuel tank jumper harness from body pass through connector. Connect a jumper wire between ground and fuel level signal circuit. Using scan tool, read fuel level sensor voltage. If voltage reading is zero volts, go to next step. If voltage reading is not zero volts, go to step  5.
  3. Connect a fused jumper wire between fuel level sensor connector signal and ground circuits at harness connector. Using scan tool monitor fuel level sensor. If scan tool reads zero volts, go to next step. If scan tool does not read zero volts, go to step  6.
  4. Remove fuel level sensor. Check for loose or broken fuel tank baffle, stuck fuel level sensor or foreign material (ice) in fuel tank. Repair fuel tank as necessary. After repairs, go to step  10. If fuel tank is okay, go to step  7.
  5. Turn ignition off. Disconnect PCM harness connector. Check fuel level sensor signal circuit for open or short to ground. Repair as necessary. After repairs, go to step  10. If circuit is okay, go to step  8.
  6. Disconnect PCM harness connector. Check fuel level sensor signal and ground circuit for open. Repair as necessary. After repairs, go to step  10. If circuit is okay, go to step  8.
  7. Replace fuel level sensor. After replacing sensor, go to step  10.
  8. Check terminal connections at PCM. Repair terminals as necessary. After repairs, go to step  10. If terminals are okay, go to next step.
  9. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  10. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step  3.
  11. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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