Drive DTCP0430 – Catalytic converter isn't working as well as it should (bank 2)
Catalyst system efficiency below threshold (Bank 2)
Emissions · generic OBD-II code
You can drive it, but take it easy and get it looked at soon – waiting usually makes the repair bigger.
Check this first
Same as bank 1 – rule out the rear oxygen sensor and exhaust leaks before replacing anything.
What usually fixes it
In the order a good shop checks them. Typical total: $103–$2,206 at $130 an hour.
Downstream oxygen sensor
The rear sensor is the cheaper and commoner cause.
Exhaust leak
Air getting in near the sensor mimics a dead converter.
Catalytic converter
Genuinely worn out, usually after a misfire went unfixed.
What the vehicle can tell you itself
A stored code is a headline, not the story. The vehicle also holds the conditions when it happened, how close the part is to the limit it fails at, what the fuel trims are doing, and whether the fault is still happening right now. Drive DTC reads all of it with a USB adapter and a Windows PC – and it can't change a single setting on the vehicle.
See what your vehicle says about P0430
Codes in plain English, what usually causes them, what the repair costs, and whether it's safe to drive.