Drive with caution — fix soon.
This code means the heated catalytic converter on bank 1 isn't reaching the efficiency the computer expects, so your exhaust isn't being cleaned properly. It often points to an aging or failing catalytic converter, but can also be caused by a faulty oxygen sensor or an exhaust leak fooling the readings. A proper diagnosis usually checks the sensors and exhaust first, since replacing the converter is the most expensive fix.
$200 – $2200
Varies by vehicle and root cause.
Usually yes, for normal short-term driving the car will run fine. But the converter isn't doing its job, so you'll pollute more and likely fail an emissions test. Get it diagnosed within a week or two to avoid bigger problems.
If it's just an oxygen sensor or an exhaust leak, repairs often run $200 to $500. If the catalytic converter itself needs replacing, expect anywhere from $900 to $2,200 depending on the vehicle.
It's not an emergency and won't usually leave you stranded, but it shouldn't be ignored. A weak catalyst means more emissions and can slowly worsen, so it's best to address it before it leads to a costly converter replacement.
No. Sometimes the real culprit is a bad oxygen sensor, an exhaust leak, or an unaddressed misfire. A good shop will rule those out first, since they're far cheaper to fix than the converter.