Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Fuel level gauge improper operation

Possible Causes

- Harness or connectors (The sensor circuit is open or shorted) - Fuel level sensor may be faulty

When Detected

When the signal received by the Powertrain Control Module )PCM) from the fuel level sensor is not as expected.

Tech Notes

There is a bulletin for some Ford vehicles. SERVICE PROCEDURE P0460 can be caused by the installation of aftermarket equipment such as remote starter systems and auxiliary fuel tanks. Ford offers a remote starter system which is recommended. If the vehicle has an aftermarket remote starter system, it would need to be removed / disabled before diagnostics for P0460 can be started. Auxiliary fuel tanks that continuously replenish the vehicles main tank will cause a P0460. Customers that replenish the vehicles fuel tank from the auxiliary fuel tank while the key is on and engine is running, can set P0460. For vehicles with an auxiliary fuel tank, it is recommended not to use the gravity / continuous fill style auxiliary fuel tanks. It is recommended to add fuel to the vehicles main tank with the key off. NOTE: P0460 CAUSED BY AFTERMARKET EQUIPMENT/VEHICLE MODIFICATIONS IS NOT COVERED UNDER WARRANTY.

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 Powertrain Control Module (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.