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2003 Hyundai Accent Code P0441: Diagnosis and Electrical Issues with Purge Valve Circuit

Model: 2003 Hyundai Accent Fault Code: P0441 Posted: 2017-06-22 15:58

I've replaced the purge valve, PCV system, gas cap, and charcoal canister, but the check engine light is still on with code P0441. When the key is off, a tester shows one wire is grounded, while when the key is turned on, the same wire reads as having power. The other wire shows a very dim voltage under both conditions—positive and negative. This inconsistent behavior suggests an electrical fault in the purge valve circuit or its wiring. I suspect the issue lies with the purge solenoid's wiring or internal components, especially since one wire should have 12V when the key is on (KOEO), while the other should show no voltage or be open. I've tested the solenoid resistance and found it to be 26 Ω at 68°F, which falls within expected range. However, vacuum tests indicate that the purge valve may be stuck open, possibly due to carbon buildup preventing proper sealing.

Related fault codes
P0441
Comments (9)
Anonymous 2017-06-22 17:07

Unplug the purge solenoid and test under KOEO (Key Off Engine On) conditions. One wire should show 12V when the key is on, while the other should read no voltage or be open—never grounded. Also check for vacuum loss when the valve is disconnected; if there's no vacuum flow, it indicates a mechanical failure.

Anonymous 2017-06-23 10:11

When the key is off, one wire reads ground; when the key is on, that same wire shows power. Is this normal behavior for the purge solenoid circuit? If so, what should I expect under proper operation?

Anonymous 2017-06-23 11:52

The purge solenoid has two wires. After unplugging the connector with the key off, one wire shows 12V when the key is turned on, and the other shows no voltage—confirmed as open circuit, not grounded.

Anonymous 2017-06-26 06:49

It appears to be an electrical issue. I'm measuring voltage on both wires: one wire reads power (grounded when off), and the other has a very dim positive reading under both key states—this is inconsistent with expected behavior.

Anonymous 2017-06-26 08:00

Please check and post your voltage readings using a digital voltmeter (DVOM). Also, measure the resistance of the purge solenoid. Manufacturer specs should be referenced in prior posts. Additionally, verify vacuum integrity by testing for leaks through the valve.

Anonymous 2017-06-26 09:03

I don't have a multimeter. However, I tested vacuum at the back of the purge valve and the gauge reads high—this suggests the purge valve is stuck open.

Anonymous 2017-06-26 14:32

After unplugging the solenoid, the valve remains open. This indicates a faulty or stuck solenoid. Remove and inspect the internal component—look for small pieces of black carbon that may be blocking the seal and preventing proper closure.

Anonymous 2017-06-26 16:28

I installed a new pump connected to the charcoal canister and reset the system, hoping it would resolve the issue. However, the problem persists—miles will tell if this fixes it or not.

Anonymous 2017-06-27 08:47

No improvement. The code P0441 remains active. I may have to consider replacing the entire system or simply junking the vehicle due to recurring issues with this specific fault.