Drive with caution — fix soon.
This code means the warm-up catalytic converter on bank 1 isn't reducing emissions efficiently enough, based on readings from the oxygen sensors before and after it. It can be caused by a worn catalyst, but also by a faulty oxygen sensor, exhaust leaks, or an underlying engine issue, so proper diagnosis matters. Fixes range from replacing a sensor to replacing the catalytic converter itself.
$200 – $1500
Varies by vehicle and root cause.
For a while, usually yes. The car typically still runs fine, but emissions are higher and you'll fail a smog test. Have it diagnosed soon so a smaller issue doesn't turn into a costly catalytic converter replacement.
It varies widely, from about $200 if it's just an oxygen sensor or exhaust leak, up to $1,500 or more if the warm-up catalytic converter needs replacing.
It's a moderate-severity code. It won't strand you immediately, but it signals an emissions problem and, if the cause is a misfire or rich condition, it can keep damaging the catalyst until addressed.
Not always. Many cases trace back to a faulty oxygen sensor, an exhaust leak, or an engine running issue. A proper diagnosis can save you from replacing the converter unnecessarily.