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P0463 is a diagnostic trouble code (DTC) for "Fuel Level Sensor Circuit High Input". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $0.0 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
P0463 OBD-II Trouble Code: Fuel Level Sensor Circuit High Input
When the powertrain control module (PCM) gets an input signal from the fuel gauge (or fuel level sensor) that is higher than the actual level of fuel in the gas tank, it will store a P0463 code, and the Check Engine Light will turn on.
The PCM determines how much fuel is in the tank by low-voltage input signals. Typically, the highest voltage reading will be five volts, and any voltage reading outside the normal range set by the manufacturer will result in a P0463 code.
Some of the most common causes for the PCM to store the P0463 code are:
There are just a few symptoms that a driver may detect when the P0463 code is stored. These include:
When diagnosing a P0463 code, a mechanic will first check the code and any other codes that have been stored by using an OBD-II scanner. After this, they’ll clear the code and attempt to duplicate the circumstances under which the code was first recorded. While doing this, they will keep watch on the fuel gauge and the data it gives, determining whether it’s erratic or steady, whether it indicates that there is more or less fuel in the tank than there actually is, etc.
After taking this test drive, the mechanic will systematically work through the probable causes, clearing the code and retesting it with each repair until the code is ultimately resolved.
Technicians report that some of the most common mistakes and misdiagnoses with a P0463 code are:
This code is not an immediate danger to the vehicle, but it can put you in a dangerous, or at least inconvenient situation. If you are unable to tell how much fuel your vehicle has, you could run out of gas when you’re far from home or in poor conditions. If your vehicle stalls due to lack of fuel in traffic, the situation could be very dangerous, as well.
Some of the most common fixes for a P0463 code include:
While you may be able to determine how much fuel your vehicle has based on mileage, it’s still important to get this code resolved as soon as possible, especially if you need to get an OBD-II emissions test to renew your vehicle’s registration in your state. When the fuel level sensor is reading as inaccurate or erratic, the PCM will keep the Check Engine Light illuminated, which will mean that you cannot pass an emissions test until the problem is resolved. Fortunately, though, this problem is usually easily fixed without great cost.
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