P0464 low

Fuel Level Sensor Circuit Intermittent

The P0464 code means the vehicle's onboard diagnostic system has detected: Fuel Level Sensor Circuit Intermittent. This is a low severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
moderate
Estimated cost
$150 - $600 (parts and labor)
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Common Symptoms

  • Check Engine Light on intermittently
  • Fuel gauge bounces or jumps erratically
  • Fuel level reading changes without adding fuel
  • Low fuel warning activates randomly

Probable Causes (Ranked by Likelihood)

  • Worn fuel level sensor with intermittent contact Very High
  • Loose fuel pump module connector High
  • Corroded wiring splice in fuel level circuit Moderate
  • Fuel slosh in tank causing intermittent float contact Low

Step-by-Step Diagnostic Procedure

  1. Monitor fuel level PID during driving. Sudden jumps indicate an intermittent connection.

  2. Inspect fuel pump connector for loose pins or corrosion.

  3. Check wiring for damage at known stress points.

  4. If external wiring is good, the sending unit in the tank likely has worn spots.

Frequently Asked Questions

Why does my fuel gauge bounce?

A worn fuel level sending unit has dead spots on the resistor card. As the fuel sloshes and the float moves, it passes through good and bad spots, causing the gauge to jump.

Is this a common problem?

Yes, fuel level sensor wear is very common on vehicles with 100,000+ miles, especially trucks and SUVs with large fuel tanks.

Can this be fixed without dropping the tank?

On some vehicles, the fuel pump module can be accessed through a panel under the rear seat. On others, the tank must be lowered.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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