why does my Honda CR-V's check engine light come on after filling gas

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Fuel Cap

• Tools Required: None
• Check the fuel cap for cracks or damage. If damaged, replace it with a new OEM fuel cap. Ensure it clicks securely when closed.

3. Check for Fuel Leaks

• Tools Required: Flashlight
• Visually inspect all fuel lines, connections, and the fuel tank for any signs of leaks.
• If any leaks are found, replace the damaged component.

4. Test and Replace EVAP Components

• Tools Required: Multimeter, vacuum pump
• Test the purge valve and vent valve using a multimeter for proper operation. If either valve is malfunctioning, replace it.
• Use a vacuum pump to check for leaks in the EVAP system. Repair or replace any faulty components.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any error codes that were stored.
• Start the vehicle and ensure the check engine light does not reappear.