Check this first
Check the fuel cap, then ask for EGR passages to be cleaned before parts are replaced.
What usually fixes it
In the order a good shop checks them. Typical total: $77–$2,206 at $130 an hour.
Fuel cap or EVAP hose
$77–$218The cheapest and most common emissions faults.
EGR or purge valve
$196–$594Valves clog with carbon or stick open.
Catalytic converter or oxygen sensor
$305–$2,206Fix any misfire or mixture fault first, or the new part will fail too.
This is the advice for this family of codes – Drive DTC doesn't have advice written for P0460 on its own yet.
Code titles are the generic SAE definitions. Prices are typical US parts and labor for a common car or light truck – a guide for judging a quote, not a quote. Always confirm a repair against the vehicle in front of you.