January 3, 2024

Acura RLX (2014-2016) Engine Light? Longer to Start?

evap engine light on Acura RLX with long start Although the Engine Light is common, your Acura RLX may have an issue with the EVAP canister vent solenoid also causing other issues like a long start. I want to share some insights into this common occurrence, especially the models from 1998 to 2014.  You might have also noticed a dip in fuel mileage. I’ve been there, and I’m here to help you through it. Let’s also remember that a simple issue like a loose gas cap can cause similar troubles.

Check for Recalls

Understanding the EVAP Canister Vent Solenoid First things first, what is the EVAP canister vent solenoid? In our Acura TLs, this part plays a vital role in controlling the emissions. It manages the flow of fuel vapors from the charcoal canister to the engine. When it works right, there’s no engine light or long start, it just keeps our air clean and the engine efficient.

Common Symptoms and Codes

The symptoms of a faulty solenoid are pretty clear:

  • engine light.
  • OBD trouble code P1457.
  • The engine takes longer to start.
  • You see your fuel mileage going down.

These signs tell you it’s time to check the EVAP system.  See all the OBD codes.

EVAP Canister Vent Solenoid on your Acura TL

Refer to Your Vehicle’s Manual: Start by checking your vehicle’s manual for the exact location of the EVAP canister vent solenoid. It’s usually located near the fuel tank or under the vehicle, close to the charcoal canister.

Visual Inspection: Look for a small, usually black or gray, plastic component. It’s connected to the EVAP canister and has an electrical connector and a vacuum line running to it.

Testing the EVAP Canister Vent Solenoid

  1. Safety First: Ensure the vehicle is off and cooled down. Disconnect the battery to avoid any electrical hazards.
  2. Locate and Disconnect: Once you’ve found the solenoid, disconnect the electrical connector.
  3. Use a Multimeter: Set your multimeter to the ohms setting and check for continuity. Place the multimeter leads on the solenoid’s terminals. A lack of continuity suggests a faulty solenoid.
  4. Vacuum Test: Using a handheld vacuum pump, apply vacuum to the solenoid valve. If it holds vacuum, the valve is functioning.

Replacing the EVAP Canister Vent Solenoid

  1. Remove the Faulty Solenoid: Once you confirm the solenoid is faulty, remove it. Disconnect any vacuum lines and unscrew or unclip the solenoid from its mounting position.
  2. Install the New Solenoid: Place the new solenoid in the same position as the old one. Make sure it’s securely mounted. Reconnect the vacuum lines and the electrical connector.
  3. Reconnect the Battery: Once the new solenoid is in place, reconnect your vehicle’s battery.
  4. Test the System: Start the vehicle and let it run. Check for any warning lights on the dashboard. You can also use an OBD-II scanner to ensure the system is functioning correctly and that no error codes are present.

Additional Tips:

  • Be aware: Any time your car is not performing the way you’d expect (like a long start), or trying to tell you something (like the engine light), it’s important to investigate.  These will only escalate, you’ll either be stuck, or it’ll cost more, or both.
  • Consult the Manual: For specific details regarding your vehicle, always consult the owner’s manual or a professional mechanic.
  • Be Gentle: When handling the new solenoid, be careful not to damage the electrical connector or the vacuum ports.