Can drive — fix at your convenience.
P0464 means the fuel level sensor circuit has an intermittent fault, where the signal cuts in and out instead of staying steady. The fuel level sensor in the tank reports the fuel amount to the gauge and computer. Because the fault comes and goes, the fuel gauge may behave erratically, but it usually doesn't affect how the car drives.
$100 – $400
Varies by vehicle and root cause.
Yes, it's generally safe. The main downside is an unreliable fuel gauge, so keep track of your mileage and fill up a little early until it's fixed so you don't run out unexpectedly.
Repairs usually run about $100 to $400. Tightening or repairing a connector and wiring is cheaper, while replacing the in-tank fuel level sensor costs more because of tank access.
No, it's low severity. It mostly affects your fuel gauge rather than how the car drives, but fixing it lets you trust the gauge again and clears the Check Engine light.
Because the fault comes and goes, often from a loose connector or chafed wire, it may not show up during a quick test. A technician may need to wiggle-test the wiring to catch it.