P0464
Fuel Level Sensor A Circuit Intermittent
Fuel level sensor
Generic OBD-II
Low
What it means
P0464 means the ECM is seeing an intermittent signal from the fuel level sensor — the tank-mounted sending unit that feeds your fuel gauge and helps the EVAP system decide when to run its tests. The signal cuts in and out, usually from a worn sending unit or a loose connection. The engine runs fine; the practical impact is a jumpy, unreliable fuel gauge, so watch your mileage until it's repaired.
Low
Can I keep driving? Safe to drive — the engine runs normally; the main effect is an erratic fuel gauge, so keep an eye on your mileage until it's fixed.
Common symptoms
What you'll notice
- Fuel gauge that jumps, drops, or reads erratically
- Inaccurate fuel-level readings
- Check-engine light on
- EVAP monitor may not complete (readiness stays incomplete)
Common causes
Most likely first
- Worn or damaged fuel level sending unit inside the tank — most commonLikely
- Intermittent open in the sensor wiringCommon
- Loose or corroded connector at the sending unit or in-line connectorCommon
- Rarely, an ECM faultLess often
How to diagnose & fix
Work through it in order
- Monitor the live fuel-level signal on a scan tool while wiggling the harness to catch the intermittent dropout.
- Inspect the wiring and connectors to the tank-mounted sending unit for corrosion or a loose pin.
- Access and test the sending unit's resistance sweep from empty to full; a dead spot means a worn sender.
- Replace the fuel level sending unit if it's worn, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0464?+
Yes. The fuel level sensor doesn't affect how the engine runs — the problem is an unreliable fuel gauge. Track your mileage so you don't run out of fuel while the erratic reading is present.
Can I just clear P0464?+
Because the fault is intermittent it may clear briefly, but it returns whenever the sensor signal drops out again. Repairing the wiring or replacing the sending unit is the real fix.
Related codes
Often seen with P0464
Read & clear P0464 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX