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What is code P0463 on a dodge diesel mean?

Code P0463 on a Dodge diesel (or any vehicle) means Fuel Level Sensor Circuit High Input.

This indicates a problem with the fuel level sensor in your fuel tank. The sensor is sending a signal that's higher than what the computer expects, suggesting the tank is "fuller" than it actually is. This could be caused by several things:

* Faulty Fuel Level Sensor: This is the most common cause. The sensor itself might be malfunctioning, giving inaccurate readings.

* Wiring Problems: A short circuit, broken wire, or corrosion in the wiring harness connected to the sensor can lead to a falsely high reading.

* Faulty Fuel Pump Module: In some vehicles, the fuel pump module houses the fuel level sensor. A problem with the module itself could cause the code.

* Debris in the Fuel Tank: Sometimes debris can interfere with the sensor's operation.

* Bad Ground Connection: A poor ground connection in the fuel level sensor circuit can also contribute to the issue.

What to do: Don't ignore this code. While you might still be able to drive, continued operation with a faulty fuel level sensor can lead to inaccurate fuel gauge readings (showing more fuel than actually present), potentially leading to running out of fuel unexpectedly.

You should have a mechanic diagnose the problem. They'll likely:

1. Inspect the wiring harness: Check for breaks, shorts, or corrosion in the wiring leading to the fuel level sensor.

2. Test the fuel level sensor: This usually involves checking the sensor's resistance at various fuel levels.

3. Inspect the fuel pump module (if applicable): If the sensor is integrated into the fuel pump module, this may need to be replaced.

4. Check for debris in the tank: This might require dropping the tank.

Simply clearing the code won't solve the underlying problem. You need to identify and fix the root cause.