P0462

DTC P0462 Fuel Level Sensor Circuit Low Voltage:

CIRCUIT DESCRIPTION
This is the fault code (current and history) that is set when the body control module (BCM) detects a short to ground at the BCM fuel sensor input.

CONDITIONS FOR SETTING THE DTC
Meet all of the following conditions:
^ Ignition 0 is active.
^ The voltage ratio of the fuel level voltage to the battery voltage is less than 1% for 2.55 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ Fuel gauge displays empty
^ Low fuel indicator illuminates
^ Stores DTC P0462 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 diagnostics table.
2. This step determines if the body control module (BCM) is reading the fuel level sensor.
3. This step determines if there is a short to ground in CKT 470 between the fuel level sensor and the BCM.
5. This step determines if there is a short to ground 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 .