Drive with caution — fix soon.
This code means the front oxygen sensor on bank 2 is reporting a steadily low voltage, which the computer reads as a constantly lean exhaust signal. It can be caused by a failing O2 sensor, wiring problems, a vacuum or exhaust leak, or an actual lean-running condition. It's a fairly common code and is often fixable once the source of the low reading is found.
$150 – $500
Varies by vehicle and root cause.
For short trips, usually yes, but you shouldn't rely on it long term. Because this is the upstream sensor that helps set the fuel mixture, a lingering problem can mean rough running and worse mileage, so get it checked soon.
Repairs typically range from $150 to $500. If it's just the oxygen sensor, you'll be near the lower end, but fixing a vacuum leak, exhaust leak, or fuel issue can raise the cost.
It's a moderate-severity code. It won't usually leave you stranded, but it affects how the engine manages fuel, so ignoring it can lead to drivability problems and higher emissions over time.
Yes, a constant low voltage can reflect a genuinely lean exhaust, often from a vacuum leak, exhaust leak, or fuel delivery problem rather than the sensor itself. A technician will check those before condemning the O2 sensor.