Trouble code · Powertrain · Generic (all makes)

P0441 Evaporative Emission System Incorrect Purge Flow

The engine computer isn't seeing the airflow it expects through the EVAP purge valve – the valve that feeds stored fuel vapour into the engine to be burned.

Safe to drive?
Usually OK to drive
Get it checked soon
Scanner you need
Any OBD2 scanner
Even a basic code reader shows it
NHTSA complaints quoting it
24
Vehicle complaints, 2015–2025

Common causes

  • Faulty purge valve (stuck open or closed)
  • Cracked or disconnected EVAP hoses
  • Clogged charcoal canister
  • Wiring problem

Symptoms

  • Usually just the check engine light
  • Sometimes a rough idle or hard start right after refueling

Can I drive with it?

Safe to drive. Fix it before an emissions test.

Tip: A purge valve stuck open often causes a hard start right after filling up – a useful clue.

Which scanner reads it?

Any OBD2 scanner reads it. Bidirectional tools can open and close the purge valve to test it.

Budget tools like the ANCEL AD310 read it; tools with live data and graphing – like the BlueDriver or OBDLink MX+ – help you find the cause. Not sure which fits you? Try the Find My Scanner quiz.

In the data

How common is it? At New York’s emissions inspections in 2020–21, P0441 was the #9 code found on cars that failed – 1.7% of all the codes found.

Of the vehicle complaints owners filed with NHTSA from 2015 to 2025, 24 quote P0441 – most often from Toyota, Jeep, Hyundai owners. Complaints lean toward serious problems, so treat this as a sign of how often the code turns up in real reports, not how often cars get it.

Both sources are compared on the Trends page.

General information to help you understand a code – not a diagnosis. Your car’s service information or a qualified mechanic has the final word. See how we research.