Can drive — fix at your convenience.
This code means the third oxygen sensor on bank 1 is switching too slowly between rich and lean readings, so the computer flags it as sluggish. It's most often caused by an aging or contaminated O2 sensor, but wiring issues or exhaust leaks can also be to blame. It's a common, sensor-related code and is usually fixable by replacing the affected sensor.
$150 – $400
Varies by vehicle and root cause.
Usually yes for normal driving. It's a slow-responding emissions sensor, so the car should run fine and stay reliable. Still, get it addressed within a few weeks to protect your fuel economy and pass emissions testing.
Expect roughly $150 to $400 in most cases, mostly for the oxygen sensor and labor. Wiring or connector repairs can be less, while sensors in tight spots can push the cost higher.
It's a low-severity code. Your engine won't be damaged in the near term, but a sluggish sensor can lead to worse mileage and a failed smog check, so it's best not to ignore it.
Oxygen sensors gradually wear out and can get coated with contaminants like oil or fuel residue, which makes them switch more slowly. Once a sensor becomes this lazy, cleaning rarely helps and replacement is the usual fix.