why does my Toyota Camry Eighth Generation (2018-present) check engine light come on after filling g...

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery negative terminal for safety.

2. Inspect and Replace Gas Cap

• Inspect the gas cap for any cracks or damages.
• If damaged, replace it with a new OEM gas cap.
• Ensure the cap seals tightly when installed.

3. Check for Fuel Leaks

• Use a flashlight to visually inspect fuel lines and connectors for any signs of fuel leaks.
• If leaks are found, tighten the connections or replace the damaged sections of the fuel line as needed.

4. Test Fuel Tank Pressure

• Connect a fuel pressure gauge to the fuel rail or test port.
• Start the engine and monitor the pressure; it should be within the manufacturer-specified range (typically around 30-50 PSI for most systems).
• If the pressure is low, check the fuel pump and fuel filter for issues.

5. Examine EVAP System Components

• Locate the EVAP purge valve and the charcoal canister.
• Inspect for blockages or physical damage.
• If the purge valve is malfunctioning, replace it to restore proper operation.

6. Reset Check Engine Light

• After repairs, reconnect the battery terminal.
• Use an OBD-II scanner to clear any error codes.
• Start the engine and ensure the check engine light does not reappear.