Can drive — fix at your convenience.
This code means there's an electrical problem in the circuit that controls the EVAP purge valve, which manages how fuel vapors are routed into the engine to be burned. It's commonly caused by a faulty purge valve, damaged wiring, or a bad connector. Repairs usually involve replacing the purge control valve and fixing any wiring or connector faults.
$100 – $450
Varies by vehicle and root cause.
Usually yes. This is an electrical fault in the EVAP purge valve circuit, so the car typically drives fine. You may notice occasional rough idle, but there's no safety risk, so just get it diagnosed within a week or two.
Most repairs run $100 to $450. The purge valve itself is fairly inexpensive, and the rest depends on how much labor and wiring work is needed to access and repair it.
It's a low-severity code. It won't strand you or damage the engine, but it keeps the check engine light on, can cause minor idle issues, and prevents passing emissions, so it's worth fixing.
The purge valve controls when stored fuel vapors are pulled from the charcoal canister into the engine to be burned. When its electrical circuit malfunctions, the valve may stick open or closed, triggering P0443.