P0463

DTC P0463 Fuel Level Sensor Circuit High Voltage:

DTC P0463 Fuel Level Sensor Circuit High Voltage (Part 1 Of 2):

DTC P0463 Fuel Level Sensor Circuit High Voltage (Part 2 Of 2):

CIRCUIT DESCRIPTION
This is the fault code (current and history) that is set when the body control module (BCM) detects a short to the battery or an open at the BCM fuel sensor input.
The BCM cannot differentiate between an open or a short to the battery.

CONDITIONS FOR SETTING THE DTC
All of the following conditions must be met:
^ Ignition 0 is active.
^ The analog fuel input is open or shorted to voltage for 2.55 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The fuel gauge displays empty.
^ The low fuel indicator illuminates.
^ Stores DTC P0463 in the BCM memory

CONDITIONS FOR CLEARING THE DTC
^ The BCM goes to sleep and reinitializes with the fault cleared.
^ All the BCM history codes will be cleared after 100 ignition cycles (from OFF to RUN) with no current codes active during the 100 ignition cycles.
^ Use the scan tool.

DIAGNOSTIC AIDS
If the DTC is a history DTC the problem may be intermittent. Perform the above tests while wiggling the wiring and connectors. This may often cause the malfunction to appear.

TEST DESCRIPTION
The numbers below refer to the numbers on the diagnostic table.
2. This step determines if the body control module (BCM) is reading the fuel level sensor.
3. This step determines if there is an open in CKT 470 between the fuel tank module and the left IP wiring harness junction block.
5. This step determines if there is an open in CKT 470 within the left IP wiring harness junction block.
6. This step determines if there is an open in CKT 470 between the left IP wiring harness junction block and the BCM.
8. This step determines if there is a short to the battery in CKT 470 between the left IP wiring harness junction block and the fuel tank module.
10. This step determines if there is a short to the battery within the left IP wiring harness junction block.