Can drive — fix at your convenience.
This code means the engine computer is reading an abnormally high voltage signal from the purge flow sensor in the EVAP system, which manages fuel vapors from the gas tank. It usually points to a wiring or connector problem, a faulty purge flow sensor, or a stuck purge valve. It's an emissions-focused code and is often fixable without major engine work.
$100 – $350
Varies by vehicle and root cause.
Yes, for normal daily driving this is usually fine in the short term. It's an emissions fault that won't damage your engine, but you should get it checked within a couple of weeks so the check engine light goes off and you can pass an emissions test.
Most repairs run between $100 and $350. A simple wiring or connector fix is on the low end, while replacing the purge flow sensor or purge valve costs more once you add parts and labor.
It's low severity. It won't leave you stranded or hurt performance much, but it keeps the check engine light on and will cause an emissions test failure, so it's worth fixing.
The purge flow sensor measures how fuel vapors flow from the charcoal canister into the engine to be burned. When it reads too high a signal, the computer sets P0469 because the readings don't match expected conditions.