P0464
Fuel Level Sensor 'A' Circuit Intermittent
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The P0464 code means the PCM has detected an intermittent signal from the fuel level sensor — the reading is jumping around in a way that doesn't correspond to normal fuel consumption or refueling. You'll likely notice your fuel gauge bouncing between different readings, sometimes dramatically, or flickering between full and empty.
Intermittent electrical problems are often the most frustrating to diagnose because the fault comes and goes. The most common cause is a worn fuel level sending unit with dead spots on its resistor strip — as the float moves across these worn areas, the resistance (and therefore the gauge reading) jumps erratically. Wiggling the connector at the fuel pump module while monitoring the fuel level signal with a scan tool can help determine if the issue is in the connection versus the sender itself.
Since the signal is intermittent rather than completely failed, your fuel gauge may work correctly some of the time, which can make it tempting to ignore. However, an unreliable fuel gauge is a genuine inconvenience and safety concern. Until repaired, track your mileage manually and refuel based on your odometer reading rather than trusting the gauge.
Severity
Symptoms
- •Fuel gauge jumps erratically between readings
- •Fuel gauge temporarily reads full then drops to empty or vice versa
- •Low fuel light flickers on and off
- •Distance-to-empty reading fluctuates wildly
- •Check Engine light is on
Likely Causes
The resistor strip inside the sending unit develops worn spots or dead zones, causing the signal to jump as the float moves across these areas.
A connector that's not fully seated or a wire with damaged insulation can make and lose contact intermittently, especially over bumps.
Partially corroded connector pins at the fuel pump module create intermittent electrical contact, causing the signal to fluctuate.
A damaged or bent float arm combined with fuel sloshing during turns and stops can produce erratic readings, though this alone rarely sets a code.
An intermittent ground or a PCM issue processing the signal can rarely cause erratic fuel level readings.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Replace the fuel level sending unit
- Repair or replace loose and corroded connectors in the circuit
- Inspect and repair wiring harness to the fuel tank for damage
- Replace the fuel pump module assembly if the sender is integrated
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P0464 | P0464 Fuel Level Sensor Circuit Intermittent | code p0464 | p0464 obd2
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