Can you tell me what p0463 code means on my 2005 Liberty

It should be okay to drive. 0463 is fuel level sensor circuit high input- the low fuel level sensor in the gas tank is acting up.

Disconect batery for one hour , when you fill gas stop at first click , do not overfill .

P0463 relates to circuit high input for fuel level sensor

P0700 Is a MIL request - control system for transmission

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 .

Most likely the cause is a bad sending unit. If the check engine light is on and the code reads p0463 you have a bad sending unit. Malibu is known for that.

take the sender unit out and check the float ,sounds like its full of petrol and not floating giving a reading of empty

It would be nice to know why the service engine light came on and is still on. An auto mechanic can read the code for you, or a dealer, or some parts stores will sell a device to read the code that caused the light to come on.

oil check oil. when light on dash comes on that means your jeep has a code for ya. take to auto zone and they will read the code for free with a code reader.

u need to change this gauge or try to dissasseble and clean it very well then try to install it back again

Unfortunately this is most likely the fuel pump module, which includes the fuel level sensor also. This should be diagnosed more thoroughly with a scanner, a good scanner will be able to check instrument cluster separately to confirm the gage is working right,and check for trouble codes that may not light any warning lamps. Hope this helps. Rate me please.P.S. Dont use that fuel station any more.