P0460-FUEL LEVEL SENSOR CIRCUIT SIGNAL VOLTAGE TOO LOW
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the ignition on.
- Set Condition:
The Fuel Level Sensor signal voltage is below 0.19 volt for 1.0 second.
| Possible Causes |
| INTERMITTENT CONDITION |
| FUEL PUMP MODULE |
| (K304) FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| FUEL LEVEL SENSOR SIGNAL AND GROUND CIRCUIT SHORTED TOGETHER |
| BODY CONTROL MODULE |
Diagnostic Test
1. CHECK FOR ACTIVE DTCNOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
With the scan tool, read ECM DTCs.
Did this DTC set again?
Yes
- Go To 2
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2. FUEL LEVEL SENSOR
Turn the ignition off.
Disconnect the Fuel Pump Module harness connector.
Turn the ignition on.
With the scan tool, read the Fuel Level Sensor voltage.
Is the voltage above 4.8 volts?
Yes
- Replace the Fuel Level Sensor in accordance with the Service Information.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Go To 3
3. (K304) FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the BCM harness connectors.
Measure the resistance between ground and the (K304) Fuel Level Sensor Signal circuit at the Fuel Pump Module connector.
Is the resistance above 1000 ohms?
Yes
- Go To 4
No
- Repair the (K304) Fuel Level Sensor Signal circuit for a short to ground.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
4. (K304) FUEL LEVEL SENSOR SIGNAL AND (K300) GROUND CIRCUIT SHORTED TOGETHER
Measure the resistance between the (K304) Fuel Level Sensor Signal circuit and (K300) Sensor Ground circuit.
Is the resistance above 1000 ohms?
Yes
- Replace and program the Body Control Module in accordance with the Service Information.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Repair the (K304) Fuel Level Sensor Signal and (K300) Ground circuit for a short together.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).