Drive with caution — fix soon.
This code means the fuel temperature sensor B is sending a reading that doesn't match what the computer expects for the current conditions, so the value is considered out of range or implausible. It often points to a failing sensor, but can also be caused by wiring problems or a poor connection. It's usually fixable by testing and replacing the sensor or repairing its circuit, without major engine work.
$120 – $350
Varies by vehicle and root cause.
Usually yes, at least for short-term driving, since this is mostly a sensor accuracy issue rather than a breakdown. Just don't let it linger for weeks, and get it checked if you notice rough running or hard starting.
Most repairs run between $120 and $350, depending on whether it's just the sensor or also wiring work. Diagnosis is usually quick, and the sensor itself is typically an affordable part.
It's generally a low-to-moderate concern. The engine can run slightly worse and use a bit more fuel, but it rarely leaves you stranded. Still, fixing it keeps your fuel system running correctly.
The 'B' refers to a specific fuel temperature sensor, since some vehicles use more than one. It tells the mechanic exactly which sensor circuit the computer flagged.