P0463 dtc code - 2006 GMC Sierra

well what engine is there.
OBD2, USA, DTC error code, P0463 is a uSa federal code.
all P0 are.
engine 3.5 or 3.9L or 5.3L v8>? ?????? ok will reads all pages

Fuel Level Sensor Circuit High Voltage Trouble Code Conditions:
The ignition is ON, with the engine running. The system voltage is between 9-16 volts.<<< (means alternator not dead )
The sensor output is greater than 2.9 volts. The above condition is present for greater than 30 seconds.

the sensor is inside the fuel tank.
OLD SKOOL: name, is fuel lever SENDER.
also makes fuel gauge work right and not lie.

Did you check the fuse that supply's battery voltage to pin # 16 at the DLC - diagnostic link connector ? That's where you plug your code reader in . The lighter fuse - 15 amp located in the under hood fuse box supply's battery voltage to pin #16 . The fuel gauge not working could be any one of a number of thing's , without testing an checking for DTC'S - diagnostic trouble code's I would only be guessing . Checking code's in the instrument cluster an PCM should be done by a qualified repair shop. The fuel level sending unit in the fuel tank is a direct input to the PCM/ECM - engine computer , the PCM / ECM sends this info too

The instrument panel cluster (IPC) displays the fuel level as determined by the powertrain control module (PCM)/engine control module (ECM). The IPC receives a GMLAN message from the body control module (BCM) indicating the fuel level volume. The fuel gage defaults to empty (E) if:
• The PCM/ECM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of GMLAN communications with the BCM.
When the fuel level is less than a certain low percentage, LOW FUEL message displays in the driver information center (DIC).

Odometer
The vehicle odometer is calculated and stored electronically in the body control module (BCM) and is sent via GMLAN to the instrument panel cluster (IPC) for display. The BCM calculates and stores the mileage based on the vehicle speed GMLAN message from the powertrain control module (PCM)/engine control module (ECM). The IPC displays the season odometer information from the BCM in the driver information center (DIC). The odometer will display error if the IPC detects an invalid odometer data from the BCM. After an invalid odometer data is received from the BCM, the IPC will display the last known odometer reading for 1.5 seconds before error is displayed in the DIC.

These can set a few different DTC'S

DTC B0158
DTC B2961
DTC P0461 (2.0L and 2.2L)
DTC P0461 (2.4L)
DTC P0462 (2.0L and 2.2L)
DTC P0462 (2.4L)
DTC P0463 (2.0L and 2.2L)
DTC P0463 (2.4L)
DTC P0464
DTC P0520


So , i suggest you take your vehicle to a qualified repair shop.

DTC P1516
Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
DTC P1518
Throttle Actuator Control (TAC) Module Serial Data Circuit
DTC P0120
Throttle Position (TP) Sensor 1 Circuit
DTC P0220
Throttle Position (TP) Sensor 2 Circuit
DTC P0336
Crankshaft Position (CKP) Sensor Performance
DTC P0463
Fuel Level Sensor Circuit High Voltage
DTC U1001-U1254
Loss of Communications

Use new parts not used . What would be better - take it to a qualified repair shop.

FUEL LEVEL SENSOR COMMON, SHOULD HAVE DTC P0463
SES LAMP WON' T BE ON WITH THIS CODE
LOCATED IN SIDE FUEL TANK

There is no module under the dash on your vehicle .
P0463 - Fuel Level Sensor A Circuit High Description: The powertrain control module (PCM) monitors the fuel level input (FLI) circuit for electrical failure. The test fails when the signal moves above the maximum allowable calibrated parameter for a specified fuel fill percentage in the fuel tank. Possible Causes:

• Fuel pump (FP) module concern
• Incorrectly installed fuel gauge
• Damaged instrument cluster
• FLI shorted to VPWR
• CASE GND circuit open
• Overfilled fuel tank
• Damaged fuel gauge

Diagnostic Aids: See the diagnostic aids for DTC P0460. Application Key On Engine Off Key On Engine Running Continuous Memory Ranger GO to Pinpoint Test HX . All others Refer to the Workshop Manual Section 413-01, Instrument Cluster for fuel level indicator diagnosis.
You start by taking to Dealer or someother qualified repair shop .
Instrument Cluster Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1202 Fuel Sender Circuit Open Instrument Cluster Go To Pinpoint Test B . B1204 Fuel Sender Circuit Short to Ground Instrument Cluster Go To Pinpoint Test B .

DTC P0463 - Fuel gauge sender unit circuit high input
• The PCM monitors the fuel tank level and input voltage from the fuel gauge sender unit when the engine is running. If the input voltage is more than 2.5 V and fuel tank level is empty, the PCM determines that the fuel gauge sender unit circuit input voltage is high.

Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.

Possible cause:
• Fuel gauge sender unit malfunction
• Instrument cluster malfunction
• PCM malfunction

Feel free to contact us if need additional details. Good luck.

Diagnostic Trouble Code (DTC) P0463 is "Fuel Level Sending Unit Volts Too High"
The fuel level sending unit voltage is monitored by the Powertrain Control Module (PCM) when the ignition switch is on and the battery voltage is more than 10.4 volts. This DTC may be stored when the fuel level sending unit voltage at the PCM is more than 9.4 volts for 2 seconds or more. The possible causes are: defective fuel level sending unit , defective connectors or wiring, or a defective PCM.

Check here for this generic DTC P0463.htm
The light is telling you there is a problem (gas gauge not functioning or what is causing the malfunction)Pull the codes to fix the problem instead of clearing the check engine light.

Hope helps (remember rated and comment this).

THERE IS A TECHNICAL SERVICE BULLETIN FOR THAT DTC JUST REPLACE THE FUEL SENDING UNIT ONLY NOT THE WHOLE FUEL PUMP REMEMBER TO REPLACE THE GASKET ALSO IF NOT YOU WILL HAVE SOME EVAP CODE

B1318 are related to low battery voltage .
B1202 is fuel sender circuit open.
P0463 is fuel level sensor circuit, (high input.)
If your gauge appears to be working o.k. all I would do for now is double check my voltage at battery with engine off & running, to make sure all is good there, erase codes & start fresh. The cheap way to erase is to remove neg (-) cable form battery for about 5 min., or more & then reconnect. You eill lose your memory on radio stations & have to re-set them though, otherwise have someone hook-up scan tool to erase them. Is vehicle starting & running o.k. at this time?