What it means
The actual purge flow does not match the commanded value. Usually a purge valve stuck closed (no flow) or stuck open (too much flow at idle). Distinct from a leak code.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The EVAP purge valve meters fuel vapour from the charcoal canister into the engine when the control module commands it. P0441 sets when the measured purge flow does not match that command, often because the valve is stuck open or closed or the purge path is restricted.
Common causes
Most likely first.
- Purge valve stuck open or closed
- Purge hose kinked or restricted
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
How to diagnose it
- Confirm P0441 and review freeze-frame data and related EVAP codes to see when the purge-flow test failed.
- Inspect the purge hose between the canister and engine for kinks, blockage, disconnection, or leaks.
- With the engine idling, use a scan tool to command the purge valve and observe whether engine response or available purge data changes.
- Check whether the purge valve seals when closed and passes flow when commanded, following the manufacturer's test procedure.
- If the valve and hose work correctly, investigate the remaining EVAP flow measurement components using service information.
Common fixes
- Reconnect or replace a damaged, kinked, or restricted purge hose.
- Replace a purge valve that leaks while closed or fails to flow when commanded.
- Repair loose or leaking connections in the purge path.
- Repair a confirmed fault in the EVAP flow measurement system.
Can I keep driving?
The code usually allows normal driving, but a purge valve stuck open can cause rough idle or hard starting, especially after refuelling. Avoid repeated short trips if it runs poorly, and address the fault soon because emissions testing may fail.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.