Error code

OBD2 P0460

OBD2P0460
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Fuel Level Sensor 'A' Circuit.

Severity

moderateCan drive, but monitor fuel gauge and low fuel warning light closely.

Summary

P0460 indicates a malfunction in the fuel level sensor circuit. This issue affects the accuracy of the fuel gauge readings and can be caused by problems with wiring, connectors, or the sensor itself.

Symptoms

  • Fuel gauge shows incorrect levels
  • Low fuel warning light stays on despite sufficient fuel
  • Engine may shut off due to lack of fuel even when gauge reads above 'Empty'
  • Self-diagnostic system displays 'EVAP System Not Ready' messages

Common Causes

  • Burnt, damaged, or corroded wiring and connectors
  • Open circuits in the sensor circuit
  • Loss of ground connection
  • Defective fuel level sender unit
  • High sulfur content in fuel causing varnish buildup on resistor (Ford-specific)
  • Damage to the fuel tank affecting float arm movement

Diagnosis

  1. Check for visible damage in wiring and connectors
  2. Perform resistance, continuity, ground, and reference voltage tests on associated wiring
  3. Test the sender unit by unplugging it from the system

Fixes

  • Repair or replace damaged wiring and connectors
  • Replace defective fuel level sender unit

FAQ

What should I do if the code persists after testing?

If all electrical values are within specifications and the issue remains, consider replacing the fuel level sender unit.

Can high sulfur content in fuel cause this problem?

Yes, especially on Ford vehicles where it can lead to varnish buildup on the resistor inside the sensor.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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