P0460 OBD-II Trouble Code: P0460 Fuel Level Sensor Circuit Malfunction

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P0460 is a diagnostic trouble code (DTC) for "P0460 Fuel Level Sensor Circuit Malfunction". 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 $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

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P0460 code definition

A P0460 code indicates that the Powertrain Control Module (PCM) has recognized a discrepancy between the fuel gauge input and the actual fuel level in the vehicle's tank.

What the P0460 code means

The amount of fuel in a vehicle's tank is communicated to the PCM in terms of voltage. A P0460 refers to a discrepancy between the fuel level and what it's being reported as being to the PCM. A P0460 blames this issue on a malfunctioning fuel level sensor. If the PCM receives a voltage level from the fuel level gauge that doesn't match the actual amount of fuel in the tank, a P0460 code will be logged in the vehicle's onboard computer. A P0460 can also be logged if the voltage input level exceeds the maximum factory level.

What causes the P0460 code?

A P0460 fuel sensor malfunction is most often caused by a faulty component in the sensor. If the components themselves are sound, there may be a concern with the electrical currents, preventing the sensor from reporting fuel levels accurately. In addition, physical damage to the vehicle's gas tank could also be to blame for a P0460, as the sensor's parameters may not line up with the tank's dimensions. In rare instances, a P0460 may be caused by a faulty fuel level controller or PCM. This possibility should only be considered once all other options are exhausted.

What are the symptoms of the P0460 code?

A P0460 will disrupt the dashboard fuel gauge's ability to accurately report your tank's fuel levels. The fuel gauge readings may be erratic, or read somewhere off the charts. Vehicles equipped with a low fuel blinker feature may also suffer from erratic low fuel warnings in the event of a P0460. Unless the P0460 code has been reported alongside other trouble code, all of the vehicle's essential systems should otherwise function normally.

How does a mechanic diagnose the P0460 code?

A mechanic will first identify a P0460 code by using an OBD-II code reader. Next, the electrical circuitry should be examined for signs of corrosion, disconnection or damage. If the electrical circuits are sound, the sensor components should be checked for faults or damage. If the fuel sensor is fine as well, the fuel tank and PCM should be checked thoroughly for visible damage as well. If the vehicle's computer has logged any other trouble codes, you may use them to guide your search for the problem.

Common mistakes when diagnosing the P0460 code

It is not uncommon for healthy sensor components to be replaced when the real problem lies with issues in the electrical current. Check the circuitry thoroughly to verify it's in working order before considering pricier solutions.

How serious is the P0460 code?

Unless a P0460 has been reported in tandem with other trouble codes, it won't compromise the vehicle's practical function. However, having an inaccurate idea of the vehicle's fuel level can make operating a P0460-afflicted vehicle uncertain and risky. If you need to make a short trip before fixing a P0460, you should check the fuel levels manually before starting the engine.

What repairs can fix the P0460 code?

If any faulty, corroded, broken or disconnected wiring has been detected in the electrical circuitry related to the fuel sensor, it should be fixed or replaced as needed. The fuel tank ground and connections with the PCM should be cleaned thoroughly as well to promote a better current. Test the voltage throughout different segments of the system between the tank, sensor and PCM. If there's a voltage discrepancy of over 1 volt between segments, it is likely that this is the faulty area. Replace and reconnect faulty components as needed. Afterwards, the vehicle should be started and all fuel-related systems checked to ensure the repairs have been completed.

Additional comments for consideration regarding the P0460 code

The fuel level sensor typically operates on very low voltage levels. In most vehicle models, this caps off at 5 volts. A P0460 code will also trigger if the voltage input registers at a higher than maximum level.

Need help with a P0460 code?

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Related questions

Failed emissions test, (OBDII), trouble code P0460: fuel level sensor circuit, the fuel gauge & warning light are accurate,? 2001 Ford Ranger
Hello - the P0460 (https://www.yourmechanic.com/article/p0460-obd-ii-trouble-code-p0460-fuel-level-sensor-circuit-malfunction-by-conor-fynes) code is not a failure of the fuel gauge, but rather a discrepancy between how much fuel the Powertrain Control Module thinks is in the tank, and the fuel gauge reading. This problem occurs most...

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