P0444 The computer sees an open circuit on the EVAP purge control valve

EVAP purge control valve circuit open

Severity not verified — if the car runs badly, have it inspected

Nissan and Land Rover bulletins and TroubleCodes.net describe a purge valve circuit fault, not a drivability hazard, but no source rates driving risk, so the class is not set.

Source: how we rate severity

P0444 in short

P0444 means the engine computer sees an open circuit on the evaporative emission purge control valve. Wiring, a loose or corroded connector or the valve itself are the usual causes. It is not usually a safety problem, but the check engine light stays on and the car may fail an emissions test.

The purge valve lets fuel vapor from the charcoal canister into the engine at the right time. The computer drives it electrically, and P0444 says that circuit looks open.

TroubleCodes.net lists damaged, corroded or disconnected wiring and connectors, an open circuit and a failed valve. Nissan bulletins name the code on the 2006 Altima and 2008 Rogue and Land Rover groups it with other purge valve codes.

Owners show how stubborn it can be: a Tucson owner says a connector was replaced and the problem persisted, and a Sentra owner says the light returned after a part was changed.

Most likely causes

  1. Wiring or connector fault at the purge valve

    Common general cause
    Why it ranks here
    TroubleCodes.net lists damaged, corroded or disconnected wiring and connectors and open circuits first. A Tucson dealer replaced the valve connector for this code.
    What would change this
    Rises if the connector is loose, corroded or the wire is broken. Falls if wiring and connector test good.
    How to test the evap canister purge valve

  2. Failed purge valve solenoid

    Supported by vehicle data
    Why it ranks here
    Nissan bulletins for the 2006 Altima and 2008 Rogue name P0444 as a purge control solenoid valve circuit open. Land Rover says its listed codes could indicate a purge valve concern.
    What would change this
    Rises if the valve coil reads open when tested. Falls if the coil tests good.
    How to test the evap canister purge valve

  3. Code returns after a part swap

    Possible — needs testing
    Why it ranks here
    A Sentra owner and a Focus owner both report the code coming back after parts were replaced. Those owner reports do not identify the cause.
    What would change this
    Rises if a replaced part did not clear the code. Falls if the code stays gone for several trips after repair.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Read all stored codes. Note whether P0443 or P0458 is stored with P0444.

    Low riskTool: OBD-II scan tool

    • IfP0443 or P0458 is stored too

      It meansThe purge valve circuit is suspect from more than one angle; check wiring and valve.

      Go to step 2

    • IfP0444 alone

      It meansCheck the connector.

      Go to step 2

  2. With the engine off, find the purge valve (usually on or near the intake manifold or the canister line) and check its connector and wiring for damage or corrosion.

    Low risk

  3. Have the purge valve coil and its circuit tested with a multimeter against the maker spec.

    Best left to a shopTool: multimeter

    Warning:The valve sits near fuel vapor lines on a hot engine; keep sparks and flames away and let the engine cool.

Symptoms

  • Check engine light
  • Failed emissions test
  • Rough idle or stalling if the valve sticks open

How to fix

  1. With the engine off, check that the purge valve connector is fully pushed in.

  2. Tighten the gas cap and recheck after a few trips.

Parts and cost context

  • EVAP canister purge valve:Check the connector and wiring first. A Tucson dealer replaced a connector and the owner says the problem persisted, so confirm with testing. Labor varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Nissan

  • NTB09-057Status unverified

    MIL on with P0444 stored

    2006altima · NHTSA 10030570

    The NHTSA summary names P0444 as the purge volume control solenoid circuit open; it does not give the repair.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

  • NTB10-018Status unverified

    DTC P0444 stored

    2008rogue · NHTSA 10033308

    The NHTSA summary names P0444 as the purge volume control solenoid circuit open; it does not give the repair.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Land Rover

  • 2013–2014 · LR4

    Supported by vehicle data

    Land Rover SSM71658 groups P0444 and P0458 with other purge valve codes on 5.0L gasoline LR4 models and Range Rover models.

  • SSM71658Status unverified

    Purge valve concern with P0444, P0458 and others

    2013–2014lr4, range-rover, range-rover-sport · NHTSA 10101325

    Lists purge valve related codes that could indicate a purge valve concern on 5.0L gasoline LR4 and gasoline Range Rover models.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Hyundai

  • 2005 · Tucson

    Supported by vehicle data

    A 2005 Tucson owner says a dealer replaced the purge control valve connector for P0444 and the problem remained. No bulletin is on file here.

  • P0443EVAP purge valve circuit fault

    Same system Supported by vehicle data

    P0443 is the purge valve circuit malfunction code; Land Rover and an owner case list it with P0444.

  • P0445EVAP purge valve circuit shorted

    Same system Supported by vehicle data

    P0445 is the shorted version of the same purge valve circuit; Land Rover groups the purge valve codes together.

All EVAP (evaporative emissions) codes

Sources and review

  1. P0444 trouble code explanation — TroubleCodes.net
  2. NHTSA complaint ODI 10640425 — NHTSA Office of Defects Investigation
  3. Nissan NTB09-057: 2006 Altima, MIL on with P0444 — Nissan North America
  4. Nissan NTB10-018: 2008 Rogue, DTC P0444 — Nissan North America
  5. Land Rover SSM71658: purge valve concern, P0442, P0444, P0456, P0458, P0459, P0496, P0497 — Jaguar Land Rover
  6. NHTSA complaint ODI 11256172 — NHTSA Office of Defects Investigation
  7. NHTSA complaint ODI 11508880 — NHTSA Office of Defects Investigation
  8. On-Board Diagnostic Trouble Codes (generic code title list) — Delaware Division of Motor Vehicles
Last reviewed
Written by
Saurabh K.
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