Error code

OBD2 P0464

OBD2P0464
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Fuel Level Sensor 'A' Circuit Intermittent.

Severity

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

Summary

P0464 indicates a problem with the fuel level sensor circuit in the fuel tank. The PCM detects an intermittent signal that doesn't match expected values.

Symptoms

  • Fuel gauge shows incorrect levels
  • Low fuel warning light is on despite sufficient fuel
  • Engine may shut off or not start due to lack of fuel

Common Causes

  • Burnt, damaged, shorted, or corroded wiring and connectors
  • Defective fuel level sender unit
  • Loss of ground connection
  • High sulfur content in fuel causing varnish buildup on the variable resistor (Ford-specific)

Diagnosis

  1. Inspect wiring for damage or corrosion
  2. Check ground connections
  3. Test sender unit resistance and continuity

Fixes

  • Replace faulty wiring or connectors
  • Replace defective fuel level sender unit

FAQ

What causes P0464?

Common issues include damaged wiring, poor connections, and a faulty fuel level sensor.

How do I diagnose P0464?

Inspect the wiring for damage, check ground connections, and test the sender unit's resistance and continuity.

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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