P0430: Catalyst System Efficiency Below Threshold (Bank 2)
What this check-engine code means in plain English, what usually causes it, and what a fix typically costs.
What P0430 means
The catalytic converter on Bank 2 (the side of the engine opposite cylinder #1) is not reducing emissions as efficiently as expected. The oxygen sensors before and after the converter are reporting similar readings, indicating the catalyst is not performing its job of cleaning exhaust gases properly.
What causes P0430?
Is P0430 safe to drive?
You can continue driving with this code in most cases, as it primarily affects emissions rather than drivability. However, a failing catalyst can eventually cause reduced power and fuel economy, and you may not pass emissions testing. Address it within a few weeks to avoid potential catalyst damage from underlying issues.
P0430 repair cost
Industry-average estimates. Cost depends heavily on whether you need just an oxygen sensor or a full catalytic converter replacement, which varies significantly by vehicle make and converter type.
Which one is it for your car?
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