What does it mean?
Stuck closed describes a second evaporative purge control valve that will not open, so stored fuel vapour has no route from the charcoal canister into the engine. The module recognises the fault during the purge flow monitor: it commands the valve open and expects a measurable change in manifold pressure, tank pressure or fuel trim, and nothing happens. Because the canister is never emptied, it gradually saturates and eventually pushes raw vapour out of the vent, which the driver notices as fuel smell. Refuelling can also become difficult because a full canister cannot accept the vapour displaced by incoming fuel. The engine itself usually runs normally, which is why the complaint is often odour or a failed emissions test rather than a driveability problem.
Symptoms
- Fuel odour around the vehicle, strongest after the tank has been filled
- Fuel nozzle clicking off repeatedly during refuelling or fuel spitting back
- MIL (check engine lamp) on with purge flow or evaporative system codes
- Evaporative readiness monitor that never sets, causing an emissions test failure
- No change in manifold vacuum or fuel trim when the valve is commanded open with a scan tool
- Occasional pressure release noise when the fuel cap is opened
Likely causes
- Solenoid plunger seized in the closed position by varnish, corrosion or contamination
- Blocked purge port or a passage plugged with charcoal dust and debris
- Collapsed, kinked or crushed purge hose between the canister and the valve
- Internal mechanical failure of the valve so the plunger no longer lifts
- Control circuit fault leaving the valve permanently de energised, which must be excluded first
- Incorrect replacement valve fitted with the wrong flow characteristic or orientation
- Water that entered the purge line and froze, blocking flow in cold conditions
How to fix it
- Confirm there is no electrical code for the same circuit, since a dead output makes a good valve look stuck
- Command the valve open with a scan tool at idle and watch idle quality, short term fuel trim and manifold pressure for any reaction
- Remove the valve and apply low pressure air while energising it on the bench to see whether it opens and flows freely
- Inspect the purge hose from the canister to the valve for collapse, kinks, crushing and internal blockage
- Check the valve inlet and the canister outlet for charcoal dust, and inspect the canister if dust is present
- Replace the valve with the correct part for the application, observing flow direction, then reconnect the lines securely
- Clear the codes and run the purge flow monitor to confirm flow is restored and the odour complaint is gone