P0460 Code: Fuel Level Sensor Circuit

What the P0460 code means

The fuel level sender reports how much fuel is in the tank. Besides the gauge needle on the dash, the computer uses it to decide when to run the EVAP test (normally with the tank between 15 and 85 percent full) and to detect misfires caused by running out of fuel.

The sender is a variable resistor moved by a float, and the computer (or the instrument cluster) measures its resistance or the resulting voltage. A circuit fault, which is what the P0460 code reports, can come from the sender, the wiring or the power supply.

With the level signal failing, the needle may stay fixed or move at random, and the EVAP test does not run. Wear on the resistive track of the sender is very common as the years go by, and the needle jumps at certain levels. Look up the sensor guide to see how it is tested.

Always start with the simplest things: fuse, relay and connector. Then check power, ground and signal with the part still connected (using back-probes), and finally the continuity of each wire to the computer. Only if all of that checks out should you replace the component.

P0460 code symptoms

• Check engine light on.
• Incorrect fuel gauge reading and an incomplete EVAP test.
• Emissions monitor incomplete, so the vehicle cannot pass inspection.
• Often there are no other driving symptoms.

Likely causes of the P0460 code

1. Damaged or corroded connector. The most frequent cause.
2. Cut or shorted wiring between the component and the computer.
3. Failed sender, open or internally shorted.
4. Missing power reference. Check whether other sensors are also failing.
5. Computer. Uncommon.

How to diagnose the P0460 code step by step

1. Read the sensor value on the scan tool and compare it with what you expect.
2. Inspect the connector for corrosion, water or loose pins.
3. Check the reference and ground and measure the sender resistance with the connector unplugged.
4. Measure the signal with the connector plugged in and see whether it changes with conditions.
5. Do a wiggle test on the wiring.
6. Check continuity to the computer.
7. Add a known amount of fuel and check whether the needle moves in proportion.
8. Measure the sender resistance at several levels at the fuel pump connector.

How to fix the P0460 code

• Repair the connector or the wiring.
• Replace the sender if the tests confirm it is bad.
• Correct the real condition if there is one (a leak or a blockage).
• Clear the codes and complete a drive cycle so the monitor runs.

Technical reference data

• Variable resistance (for example 10 ohms full and 180 ohms empty, or the other way around, depending on the manufacturer).
• Approximate values only: check the manufacturer data for your engine.

Brand-specific notes

On many vehicles the fuel level sender is sold together with the fuel pump module, and on others it is sold separately. Check which applies to yours before you price the repair.

If the needle jumps at certain fuel levels, suspect a worn resistive track in the sender before you suspect the wiring.

Frequently asked questions about P0460