P1441Manufacturer-specific code

P1441 Code: EVAP System Flow During Non-Purge (GM)

On General Motors vehicles (Chevrolet, GMC, Buick, Cadillac), the P1441 code means the EVAP system shows vapor flow while the purge is commanded off. You may notice a rough idle after refueling. Other brands may define this number differently.

Severity
Low
Can I keep driving?
Yes, no immediate risk
Estimated cost
$30 to $150
Difficulty
Easy
System
Emissions Control
Applies to
Depends on the manufacturer

Common in: Chevrolet

Updated Reviewed by Renzo Chacca

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What the P1441 code means

P1441 is a manufacturer-specific code: the 1 in the second position means each automaker defines what it means, not the generic SAE standard. The most widespread definition is the one used by General Motors (Chevrolet, GMC, Buick, Cadillac). If your vehicle is another brand, confirm the code text with a scan tool that supports that manufacturer.

ManufacturerMeaning of P1441
General Motors (Chevrolet, GMC, Buick, Cadillac)EVAP system flow during non-purge

The canister purge valve should only let vapors into the engine when the computer commands it.

The computer sets the P1441 code when it detects vacuum in the tank or vapor flow while the purge is closed: the purge valve lets vapor through even though it is switched off.

Before you start repairs, confirm the make, model, year and engine. With manufacturer codes, the same number can change even between engines from the same brand.

P1441 code symptoms

  • Check engine light on.
  • Rough idle after refueling.
  • Hard starting after refueling.

Likely causes of the P1441 code

  1. Purge valve that does not close. This is the most frequent cause.
  2. Hoses connected wrongly. Check for cracks and clamps, especially in the hot areas.
  3. Tank pressure sensor. Confirm it by comparing its reading with the real value.

How to diagnose the P1441 code step by step

  1. Disconnect the purge valve and apply vacuum. With the valve unpowered, no air should pass.
  2. Inspect the hoses for wrong connections, cracks and kinks.

How to fix the P1441 code

  • Replace the purge valve.

Technical reference data

  • The purge valve must be closed with no voltage applied.
  • P1xxx codes are manufacturer-specific: confirm the definition with a scan tool that supports your brand.
  • Reference values: check the manufacturer data for your vehicle.

Brand-specific notes

On these vehicles the purge valve is the first part to test, and a simple vacuum check tells you whether it is leaking.

P1441 on GM

Common on Chevrolet, GMC, Buick, Pontiac and Cadillac vehicles.

If your vehicle is another brand, check the table above for the meaning its manufacturer gives this code and confirm it with a compatible scan tool.

Frequently asked questions about P1441

What does the P1441 code mean on a GM?
It means the EVAP system shows flow while the purge is commanded off. You may notice a rough idle after refueling.
Does P1441 mean the same thing on every brand?
No. It is a manufacturer-specific code, so on other brands it may not exist or may mean something different. Confirm it with a scan tool that supports your make.
Can I drive with a P1441 code?
Yes. With a P1441 code severity is low and the vehicle normally drives as usual. Expect a possible rough idle or hard start after filling the tank.
How much does it cost to fix P1441?
Roughly $30 to $150 on a GM. Most of that is the purge valve itself, plus a little labor.
Will a P1441 code clear itself?
Not while the purge valve keeps leaking. After a repair, clear the code and make sure it does not come back.
What is the most common cause of P1441?
A purge valve that does not close is the most frequent cause. Wrongly connected hoses and the tank pressure sensor are the next things to check.

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