Po463 fuel level sensor circuit voltage too high. how to fix?

P0463 CHEVROLET - Fuel Level Sensor Circuit High Input

https://www.autocodes.com/p0463_chevrolet.html

Hello, Here is website explaining the code you are getting.
P0463 Fuel Level Sensor Circuit High Input

Most likely a faulty fuel level sender , mounted on the fuel pump module in the fuel tank. Recommend replace complete assembly.

The P0463 code (Fuel Level Sensor Circuit High Voltage) means that your fuel guage circuit is open. To fix the fuel guage, the tank must come out to replace the sending unit. Personally I wouldn't worry about it too much. Use your trip guage and fill up after 200/250 miles. You'll never run out.

P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0463 Fuel Level Sensor Circuit High input

obd2 code scanner

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

P0183 = Fuel temperature sensor A circuit, high input

P0455 = evaporative emission (EVAP) control system leak detected (no purge flow or large leak)

P0463 = fuel level sensor circuit, high input.

Check to see if the charcoal (evap) canister is full of fuel. If so, empty it. Check for a faulty canister vent valve. Check for a short to ground in wiring to fuel temp sensor and fuel level sensor.

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.

Hello. There are several possible causes of your issue. Replacing parts to find the root cause is an expensive route for you. Why not drive to an AAMCO and have them give you the free computer scan which may pinpoint the issue. On the otherhand, nothing may show up. To prevent running out of fuel be sure to maintain a log of fuel use. Good luck. Joe

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