Diagnostic Test

1) ACTIVE DTC
NOTE: Diagnose any CAN C Bus communication DTCs before continuing.

NOTE: Diagnose P0462 or P0463 first, if set along with P0461.

Start the engine.

Allow the engine to reach normal operating temperature.

With a scan tool, select View DTCs.

NOTE: It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.

Is the DTC Active or Pending at this time?

Yes
1. Go to 2).
No
1. Refer to INTERMITTENT CONDITION Diagnostic Procedure.
2) VISUALLY INSPECT FUEL TANK
Visually inspect the Fuel Tank for damage that may restrict the Fuel Sending Unit float from moving.

Is the Fuel Tank OK?

Yes
1. Go to 3).
No
1. Replace the Fuel Tank as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
3) (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Fuel Level Sensor Signal Circuit For Short To Voltage
Courtesy of CHRYSLER LLC

Disconnect the Fuel Pump Module harness connector.

Ignition on, engine not running.

Measure the voltage on the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector.

Is there any voltage present?

Yes
1. Repair the short to voltage in the (N4) Fuel Level Signal circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 4).
4) (N4) FUEL LEVEL SIGNAL CIRCUIT OPEN

Fig 2: Measuring Resistance Of Fuel Level Sensor Signal Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the C2 BCM harness connector.

Measure the resistance of the (N4) Fuel Level Signal circuit from the Fuel Pump Module harness connector to the C2 BCM harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Go to 5).
No
1. Repair the open in the (N4) Fuel Level Signal circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
5) (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO GROUND

Fig 3: Checking Fuel Level Sensor Signal Circuit For Short To Ground
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector.

Is the resistance below 100 ohms?

Yes
1. Repair the short to ground in the (N4) Fuel Level Signal circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 6).
6) (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO THE (G310) SENSOR GROUND CIRCUIT

Fig 4: Checking Fuel Level Sensor Signal Circuit & Ground Circuit Resistance
Courtesy of CHRYSLER LLC

Measure the resistance between the (G310) Sensor ground circuit and the (N4) Fuel Level Signal circuit in the Fuel Pump Module harness connector.

Is the resistance below 100 ohms?

Yes
1. Repair the short between the (G310) Sensor ground circuit and the (N4) Fuel Level Signal circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 7).
7) (G310) SENSOR GROUND CIRCUIT OPEN

Fig 5: Checking Resistance In Fuel Level Sensor Ground Circuit
Courtesy of CHRYSLER LLC

Measure the resistance of the (G310) Sensor ground circuit from the Fuel Pump Module harness connector to the C2 BCM harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Go to 8).
No
1. Repair the open in the (G310) Sensor ground circuit.
2. Perform POWERTRAIN VERIFICATION TEST .
8) INTERNAL INSPECTION OF THE FUEL TANK
WARNING: The fuel system is under a constant pressure (even with the engine off). Before testing or servicing any fuel system hose, fitting or line, the fuel system pressure must be released. Failure to follow these instructions can result in personal injury or death.

Remove the Fuel Tank per Service Information.

Remove the Fuel Pump Module.

Visually inspect the inside of the Fuel Tank for any obstructions or deformities.

Inspect the Fuel Pump Module Float arm for damage.

Were any problems found?

Yes
1. Repair or replace as necessary.
2. Perform POWERTRAIN VERIFICATION TEST .
No
1. Go to 9).
9) FUEL LEVEL SENSOR
If there are no possible causes remaining, view repair.

Repair
1. Replace the Fuel Level Sensor.
2. Perform POWERTRAIN VERIFICATION TEST .