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Home >> Isuzu >> 2000 >> Hombre S, 4.3 W >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 4.3L >> Diagnostic Trouble Code Identification >> DTC P0461: Fuel Level Sensor Circuit Performance >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic II (OBD-II) System Check. See SELF-DIAGNOSTICS - INTRODUCTION article. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Ensure Tech 2 scan tool is installed. Record fuel level sensor voltage. Change level of fuel in tank. Recheck fuel level sensor voltage. If voltage changed, go to next step. If voltage did not change, go to step  4.
  3. DTC P0461 is intermittent. If any additional DTCs are set, diagnose affected DTCs. If no additional DTCs are set, go see DIAGNOSTIC AIDS .
  4. Turn ignition off. Locate fuel level sending unit harness connector forward of fuel tank. Disconnect fuel sending unit harness connector. Turn ignition on, with engine off. Using DVOM connected to ground, probe fuel level sensor signal circuit (Purple wire). If about 5 volts exist, go to step  6. If about 5 volts does not exist, go to next step.
  5. Repair open or short to ground in fuel level sensor signal circuit (Purple wire). After repair, go to step  9.
  6. Check fuel level sensor for tight harness connections, proper sensor alignment in fuel tank, and restriction or binding of float. If problem is found, go to next step. If no problem is found, go to step  8.
  7. Repair fuel level sensor connections and/or alignment as necessary. After repair, go to step  9.
  8. Replace fuel level sensor. After sensor replacement, go to next step.
  9. Record fuel level sensor voltage. Change level of fuel in tank. Recheck fuel level sensor voltage. If voltage changed, go to next step. If voltage did not change, go to step  2.
  10. Using scan tool, select Read and Record INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, diagnose affected DTCs. If no DTCs are displayed, system is okay.
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