EVAP Purge Valve

Replacement of the EVAP purge valve (canister purge solenoid) that controls vapor flow from the charcoal canister to the intake manifold.

Warnings

Tools required

Parts

• EVAP purge valve (canister purge solenoid) × 1 — Mopar 4891832AA or equivalent

Preparation

1. Ensure the engine is cold and the vehicle is parked on level ground
2. Open the hood and secure it in the raised position
3. Disconnect the negative battery cable to prevent electrical faults during connector removal

Procedure

1. 1

   Locate the EVAP purge valve
   The EVAP purge valve is mounted in the engine bay near the intake/throttle body area. It is a cylindrical solenoid valve with two vapor hoses (one from the canister, one to the intake manifold) and an electrical connector. Verify the exact location against the factory service manual before proceeding. It is a cylindrical solenoid valve with two vapor hoses (one from the canister, one to the intake manifold) and an electrical connector. Use a flashlight to identify the component before proceeding.
2. 2

   Disconnect the electrical connector
   Press the locking tab on the electrical connector at the purge valve and pull the connector straight off. There is no secondary lock on this connector. Inspect the connector terminals for corrosion or damage.
3. 3

   Remove the intake manifold vapor hose
   The hose running from the purge valve to the intake manifold is secured with a spring clamp. Use needle-nose pliers to compress the tabs on the spring clamp and slide it back along the hose away from the valve nipple. Twist and pull the hose off the purge valve nipple. Inspect the hose end for cracking or deterioration.
4. 4

   Remove the canister supply hose
   The hose running from the EVAP canister to the purge valve is secured with a spring clamp. Use needle-nose pliers to compress the tabs on the spring clamp and slide it back along the hose. Twist and pull the hose off the purge valve nipple. Expect a small amount of fuel vapor odor when disconnecting this line.
5. 5

   Remove the purge valve mounting fastener
   The purge valve may be secured to its mounting bracket with a single small fastener (often 10mm) or may clip/snap into the bracket. Inspect the mounting method before attempting removal; if a fastener is present, use the appropriate socket to remove it. Use a 10mm socket and ratchet to remove the fastener completely. Support the valve while removing the fastener to prevent it from falling into the engine bay.
6. 6

   Remove the purge valve from the bracket
   Lift the purge valve up and out of the mounting bracket. Maneuver it carefully past surrounding hoses and wiring. Set the old valve aside for comparison with the new unit.
7. 7

   Inspect and clean the mounting area
   Check the mounting bracket for cracks or damage. Wipe away any dirt or debris from the bracket and surrounding area. Inspect both vapor hoses for cracks, especially near the ends. Replace any hoses that show signs of deterioration.
8. 8

   Install the new purge valve
   Position the new purge valve in the mounting bracket with the electrical connector facing outward for access. Ensure the valve nipples are oriented correctly to align with the vapor hoses without kinking. If the valve uses a fastener, insert and hand-tighten it, then snug it with a ratchet, being careful not to overtighten a plastic or thin metal bracket. If the valve is clip-retained, press it firmly into the bracket until it snaps into place.
9. 9

   Reconnect the canister supply hose
   Push the canister supply hose (from the EVAP canister) firmly onto the appropriate nipple on the purge valve until it bottoms out. Slide the spring clamp back into position over the hose connection using needle-nose pliers. Ensure the clamp is positioned properly behind the bead on the valve nipple.
10. 10

    Reconnect the intake manifold vapor hose
    Push the intake manifold vapor hose firmly onto the remaining nipple on the purge valve until it bottoms out. Slide the spring clamp back into position over the hose connection using needle-nose pliers. Ensure the clamp is positioned properly behind the bead on the valve nipple.
11. 11

    Reconnect the electrical connector
    Push the electrical connector onto the purge valve solenoid terminals until the locking tab clicks into place. Tug gently on the connector to verify it is fully seated and locked.
12. 12

    Reconnect the battery
    Reconnect the negative battery cable and tighten the terminal clamp securely. The PCM will need to relearn idle and fuel trim parameters after battery disconnection.

Reassembly

1. Double-check that both vapor hoses are securely attached with spring clamps properly positioned
2. Ensure the electrical connector is fully seated and locked
3. Verify no tools or parts have been left in the engine bay

Verification

• Start the engine and allow it to idle. Listen for any vacuum leaks or unusual hissing sounds near the purge valve location
• Use an OBD-II scanner to verify there are no EVAP system fault codes (P0441, P0443, P0455, etc.)
• Perform a drive cycle with multiple cold starts and warm-up periods to allow the PCM to test the EVAP system purge function
• Monitor for check engine light illumination over the next few days of driving

Related trouble codes on this vehicle

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