Error Code P0460 is defined as Fuel Level Sensor Circuit Malfunction. Meaning, there’s a discrepancy detected between the fuel gauge and the actual fuel level of the tank, which could be caused by a problem in the fuel sensor.
This code is a generic trouble code, meaning it applies to all cars equipped with OBD-II, especially those made from 1996 up to the present day. It is, however, more common among Chrysler, GM, Ford, Lincoln, Mercury, Kia, Mazda, Mercedes Benz, Infiniti, Nissan and Subaru cars. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model to another.
The fuel level sensor (also known as sender) is an essential component of the fuel pump module and located in the fuel tank. This component can’t be replaced without replacing the pump module, though there are some exceptions. Attached to the arm is a float that travels with a resistor grounded to the tank, frame or a dedicated ground circuit. The sender receives a supplied voltage, and the ground path changes according to the level of fuel. The amount of voltage depends on the system, but in many times it’s around 5V.
As the fuel level changes, the float moves the arm, changing the resistance to ground which varies the voltage signal. This signal will either go straight to the fuel pump computer module, or to the instrument cluster module. Depending on your 2017 Ford Fiesta hatchback’s system, the fuel pump computer module may only monitor the resistance to ground, and then relay the fuel level information to the instrument panel. If the PCM (powertrain control module, also known as ECM or engine control module in other 2017 Ford Fiesta hatchback makes) detects a discrepancy between fuel gauge input and the actual fuel level in the tank, then the Error Code P0460 will be registered.
Related Error Codes include:
As with other error codes, this code activates the Check Engine light as its first symptom.
Symptoms for this error code depend on the severity of the problem. If the problem is caused by a mechanical failure, then it’s usually a severe case. If it’s caused by an electrical problem, then it’s considered not severe, as the PCM can compensate for it. Compensation simply means the fuel gauge reads Empty or Full at the time.
Common symptoms include:
Vehicles that come with a low fuel blinker feature may also suffer from erratic low fuel warnings in the event of a P0460.
Common causes for this code include:
As with most error codes, diagnosing this code starts with the use of an OBD-II code reader.
Next, they check the electrical circuitry and look for signs of damage, disconnected wires, and corrosion. If the electrical circuits look good, they will proceed with checking the components for damages or faults.
If the sensor is in good shape as well, then they will proceed on checking the fuel tank and the PCM and look for signs of damage.
If your 2017 Ford Fiesta hatchback’s computer has logged any other trouble codes, you may use them to guide your search for the problem.
Common repairs for this code include:
Error Code P0460 isn’t usually a serious problem that causes 2017 Ford Fiesta hatchback malfunction or drivability problems unless it comes in tandem with other trouble codes. Having an inaccurate reading of your fuel level, of course, can be risky, as you’re uncertain of how much fuel your 2017 Ford Fiesta hatchback has. Thus, if you need to make a short trip with this code present, then you have to check the fuel levels manually.