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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P1431: Fuel Level Sensor No. 2 (Right Side) Performance ("Y" Body) >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK . After performing OBD system check, go to next step.
  2. Using scan tool, check if DTC P0461 is also set. If DTC P0461 is set, diagnose DTC first. See DTC P0461: FUEL LEVEL SENSOR CIRCUIT PERFORMANCE ("Y" BODY) . If DTC P0461 is not set, go to next step.
  3. Disconnect fuel level sensor No. 2 connector at right fuel tank. Using scan tool, read fuel level sensor voltage. If voltage reading is zero volts, go to next step. If voltage reading is not as specified, go to step  9.
  4. Connect a fused jumper wire between fuel level sensor No. 2 connector signal and ground circuits. If voltage reading is zero volts, go to next step. If voltage reading is not zero volts, go to step  10.
  5. Using scan tool, monitor fuel level in left fuel tank. If left fuel tank is empty, add gasoline. Disconnect upper siphon jet pump feed pipe from right fuel tank. Insert siphon jet pump feed pipe into empty, approved gasoline container. Using scan tool, command fuel pump ON for 10 seconds. Measure volume of fuel in container. If volume is greater than.633 pint (.30L), go to next step. If volume is not as specified, go to step  11.
  6. Reconnect upper siphon jet pump feed pipe to right fuel tank. Disconnect upper siphon jet pump feed pipe from left fuel tank. Insert siphon jet pump feed pipe into empty, approved gasoline container. Using scan tool, command fuel pump ON for 8 seconds. Measure volume of fuel in container. If volume is greater than.703 pint (.33L), go to next step. If volume is not greater than.703 pint (.33L), go to step  12.
  7. Remove fuel level sensor No. 2 from right fuel tank. Check for foreign material (such as ice) in fuel tank. Repair fuel tank as necessary. After repairs, go to step  16. If no foreign material is found in tank, go to next step.
  8. Set DVOM to 400 ohm range. Connect DVOM between fuel level sensor No. 2 (sensor side) signal and ground circuits. Sweep sensor from stop to stop. If resistance varies smoothly from about 40-250 ohms, see DIAGNOSTIC AIDS . If resistance does not vary smoothly from about 40-250 ohms, go to step  13.
  9. Turn ignition off. Disconnect PCM harness connector. Check fuel level sensor No. 2 signal circuit for short to voltage. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to step  14.
  10. Turn ignition off. Disconnect PCM harness connector. Check fuel level sensor No. 2 signal circuit for open or short to ground. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to step  14.
  11. Inspect siphon jet pump feed pipe for restrictions. Repair as necessary. After repairs, go to step  16.
  12. Inspect siphon jet pump feed pipe for restrictions. Repair as necessary. After repairs, go to step  16. If no restrictions are found, go to next step.
  13. Replace fuel level sensor No. 2. After replacing fuel level sensor, go to step  16.
  14. Check terminal connections at PCM. Repair terminals as necessary. After repairs, go to step  16. If terminals are okay, go to next step.
  15. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  16. 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  2.
  17. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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