What is causing the code p 0464

P0463 Hyundai - Fuel Level Sensor 'A' Circuit High Input
P0464 Hyundai - Fuel Level Sensor 'A' Circuit Intermittent
P0463 Hyundai - Fuel Level Sensor 'B' Circuit High Input
Possible causes
- Faulty fuel level sensor
- Fuel level sensor harness is open or shorted
- Fuel level sensor circuit poor electrical connection
The fuel level sensor of Hyundai Santa Fe is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the Engine Control Module (ECM). The fuel level sensor consists of two parts, one is mechanical float and the other side is variable resistor. The fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.

Hi,
Symptoms of a bad or failing Engine Oil Pressure Sensor

• Oil Pressure Light comes on, and you check the engine oil level, But oil level is okay, you can blame the false reading on the sensor.
• Oil Pressure Light blinking constantly. This is the normal >check< oil pressure sensor Warning that the sensor is going out.
• If the sensor is giving false readings, Dispite oil level, the sensor could be replaced.

If the Sensor is currently not working, and does not warn you of engine oil level, and oil level gets extremely low, The Engine could burn up/stall due to lack of oil, and may not restart.
Then you could probably blame it on the sensor.
But really would be lack of oil.

Intermittent No Start,
Common causes deal with 3 basic systems/areas of engin

1. Compression, its the build up of air and fuel into the engines cylinders. Then is compressed by the pistons. And is under pressure. FAILURE An Air leak (vacumm leak) will allow pressure to escape.
2. Ignition System, good battery, good relays, wires are not loose or disconnected, good 10volts to starter, 10volts to distributer>gives 20kvolts to spark plugs>has strong spark to ignite compressed air in cylinders. Other sensors need to work. Crankshaft sensor(ccs) Throttle Position Sensor(TPS), +more
3. Air/fuel Ratio, Air Intake Manifold, and Fuel Pressure Sensor *Fuel Injection Pressure Sensor---if car is fuel injected*, air filter is clean and intake manifold hose, Throttle Plate Acuater, Idle Air Contro Valve(IAC). Also vacumm leak cause no start. To much air not enough fuel will cause lean fuel mixter==low power, low idle, no start.......To much fuel not enough air will cause rich fuel mixter==too much fuel could cause engine knock, flooding of engine wet spark plugs, No Start

Scan Vehicle computer for Codes, Places like AutoZone---Discount AutoParts will connect scanner for free, And Code Will say What is wrong with Vehicle,

code p 0183 refers to fuel temperature sensor A --high input===causes --wiring short to positive ---fuel temp sensor--ECM
code p 0463 refers to fuel tank level sensor --high input===causes --wiring short to positive fuel tan level sensor ---ECM
if the temp sender and the fuel level sensor ( both located in the same fitting in the tank)are in the same wiring harness then there may be a connection as the wiring short to positive is common
check for the harness rubbed through somewhere causing the problem or an after market screw screwed into the harness some where

P0462 is Fuel Level Sensor Circuit Low Voltage.
Possible causes - Faulty fuel level sensor
- Fuel level sensor harness is open or shorted
- Fuel level sensor circuit poor electrical connection
Low fuel level can trigger this code. Before replacing any parts try filling up the fuel tank and erasing the engine code. If the problem persist it may be necessary to replaced the fuel level sensor.

P0460 - Fuel Level Sensor Circuit Malfunction
Possible causes- Fuel Level Sensor harness is open or shorted
- Fuel Level Sensor circuit poor electrical connection
- Faulty Fuel Level Sensor
- Faulty combination meter

Read more: http://engine-codes.com/p0460.html#ixzz26lL9SePi

Possible causes - Fuel level sensor circuit harness is open or shorted
- Fuel level sensor circuit poor electrical connection
- Faulty fuel level sensor in fuel tank (most common cause) P0463 Description The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the Engine Control Module (ECM). The fuel level sensor consists of two parts, one is mechanical float and the other side is variable resistor. The fuel level sensor output voltage changes depending on the movement of the fuel mechanical float

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.

1. The Fuel Level Sending Unit, or Fuel Level Sensor, is located in your gas tank with the Fuel Pump Module. The fuel gauge sending unit (fuel level sensor) is attached to the side of the fuel pump module. The sending unit consists of a float, an arm, and a variable resistor track (card).
2. The Fuel Pressure Regulator is located within fuel pump module. The fuel pressure regulator controls fuel system pressure. The PCM cannot detect a clogged fuel pump inlet filter, clogged in-line fuel filter, or a pinched fuel supply or return line. However, these could result in a rich or lean condition causing the PCM to store an oxygen sensor or fuel system diagnostic trouble code.

Both of these sensors are connected with the Fuel Pump Module. Here is a diagram:


I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

P0138 - O2 Sensor Circuit High Voltage Bank 1 Sensor 2

The rear heated oxygen sensor (or sensor 2), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Even if switching characteristics of the heated oxygen sensor 1 are shifted, the air-fuel ratio is controlled to stoichiometric, by the signal from the heated oxygen sensor 2. This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 2 is not used for engine control operation.

Causes:
- Harness or connectors (The sensor circuit is open or shorted)
- Rear heated oxygen sensor (Bank 1) may be faulty

Solutions:
Replacing the O2 Sensor 2 usually takes care of the problem


P0141 - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2

Causes:
- Harness or connectors (The sensor circuit is open or shorted)
- Rear heated oxygen sensor (Bank 1) may be faulty

Solutions:
Replacing the O2 Sensor 2 usually takes care of the problem


P0463 - Fuel Level Sensor Circuit High Input

The fuel level sensor is mounted in the fuel level sensor unit. The sensor detects a fuel level in the fuel tank and transmits a signal to the ECM or PCM, It consists of two parts, one is mechanical float and the other side is variable resistor. Fuel level sensor output voltage changes depending on the movement of the fuel mechanical float.

Causes:
- Fuel level sensor circuit harness or connectors is open or shorted
- Fuel level sensor may be faulty

Solutions:
Replaced fuel level sensor.

Definition of Diagnostic Trouble Code P1346 Audi: Ignition Coil Power Output Stage 3 Short to B+ BMW: Misfire During Start Cylinder 3 Buick: Intake Camshaft Position [CMP] Sensor System Performance Cadillac: Intake Camshaft Position [CMP] Sensor System Performance Chevrolet: Intake Camshaft Position [CMP] Sensor System Performance Ford: Fuel Level Sensor B Circuit GMC: Intake Camshaft Position [CMP] Sensor System Performance Lexus: VVT Sensor Rang/Performance Problem (Bank 1) Lincoln: Fuel Level Sensor B Circuit Mazda: Fuel Level Sensor B Circuit Mercury: Fuel Level Sensor B Circuit Oldsmobile: Intake Camshaft Position [CMP] Sensor System Performance Pontiac: Intake Camshaft Position [CMP] Sensor System Performance Saturn: Intake Camshaft Position [CMP] Sensor System Performance Toyota: VVT Sensor /Camshaft Position Sensor Circuit Range/ Performance Problem (Bank 1) Volkswagen: Ignition Coil Power Output Stage 3 Short to B+