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DTC Troubleshooting

DIAGNOSIS PROCEDURE - DTC P0462 FUEL LEVEL SENSOR LOW INPUT

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD) System Check.
Is the system check complete?		 - Go to Step 2. Go to "ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK ".
2
  1. Turn the ignition switch to ON.
  2. Install a scan tool.
  3. Operate the vehicle within Freeze Frame conditions as noted.

Is the DTC P0462 set?		 - Go to Step 3. Go to "DIAGNOSTIC AIDS ".
3
  1. Disconnect the fuel sender electrical connector from the fuel pump.
  2. Using a digital voltmeter (DVM), measure the voltage in the signal circuit at terminal 1.

Is the voltage within the specified value?		 0.2-4.8 V Go to Step 4. Go to Step 6.
4 Check for a proper ground connection at the fuel tank and repair as necessary.
Is a repair necessary?		 - Go to Step 11. Go to Step 5.
5
  1. Remove the fuel sender from the fuel tank.
  2. Reconnect the fuel sender electrical connector.
  3. Monitor the Fuel Level Sensor parameter on the scan tool while moving the Fuel Level Sensor float from the empty position to the full position.
  4. Repeat the procedure several times.

Does the Fuel Level Sensor value on the scan tool increase and then decrease steadily when the float is moved?		 - Go to "DIAGNOSTIC AIDS ". Go to Step 8.
6 Check for an open or short to ground in the Fuel Level Sensor circuit and repair as necessary.
Is the repair necessary?		 - Go to Step 11. Go to Step 9.
7 Repair the open or short to ground in the Fuel Level Sensor circuit between the Fuel Level Sensor harness connector and the Fuel Level Sensor.
Is the repair complete?		 - Go to Step 11. -
8 Replace the fuel sender assembly.
Is the replacement complete?		 - Go to Step 11. -
9
  1. Connect the fuel sender electrical connector.
  2. Disconnect the engine control module (ECM) connector.
  3. Using a digital voltmeter (DVM) measure the voltage in the signal circuit, at terminal 51.

Does the DVM read within the specified value?		 0.2 - 4.8 V Go to Step 10. Go to "FUEL GAUGE DIAGNOSIS ".
10 Replace the ECM.
Is the repair complete?		 - Go to Step 11. -
11
  1. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
  2. Start the engine and idle at normal operating temperature.
  3. Operate the vehicle within the conditions for setting the DTC as specific in the supporting text.

Does the scan tool indicate that this diagnostic ran and passed?		 - Go to Step 12. Go to Step 2.
12 Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 - Go to applicable DTC TABLE . System OK
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