Can drive — fix at your convenience.
This code means the engine computer is seeing no signal activity from the third oxygen sensor on bank 1, as if the sensor is asleep or disconnected. It's usually caused by a failed O2 sensor, broken or unplugged wiring, or a blown sensor heater. It's a common, sensor-related code and is typically fixed by repairing the wiring or replacing the sensor.
$150 – $450
Varies by vehicle and root cause.
For normal use, usually yes. The sensor just stopped reporting, so the car should run and stay reliable. Still, have it checked within a week or two so your emissions system works properly and you can pass a smog test.
Most repairs land between $150 and $450, depending on whether it's the sensor, the wiring, or the heater circuit. The sensor and labor are the biggest factors, and hard-to-reach locations cost more.
It's a low-severity code. It won't hurt your engine in the short term, but a non-responsive O2 sensor means worse emissions monitoring and a likely failed smog test, so it's worth fixing soon.
It usually means the sensor signal is flatlined, often because the sensor itself has failed, its wiring is broken or unplugged, or its internal heater isn't working. A technician can quickly check the wiring and sensor heater to pinpoint which it is.