my Toyota Camry Eighth Generation (2018-present) has a check engine light and runs rough what to do

Solution

1. Preparation

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

2. Addressing Error Codes

• Reconnect the OBD-II scanner to the vehicle and note the trouble codes.
• Clear the codes and take the vehicle for a short test drive to see if the codes return.

3. Inspect and Replace Spark Plugs

• Remove the ignition coil(s) using a socket set.
• Extract the spark plugs using a spark plug socket.
• Inspect the spark plugs for wear; replace if necessary (OEM specification: NGK Laser Iridium).
• Reinstall new spark plugs and reattach the ignition coils, ensuring proper torque (typically 13-15 Nm).

4. Fuel System Check

• Connect a fuel pressure gauge to the fuel rail.
• Start the engine and check for proper fuel pressure (typically 40-50 psi for the Camry).
• If pressure is low, consider replacing the fuel pump or fuel filter.

5. Inspect Air Intake and Sensors

• Remove the air intake duct to access the mass airflow sensor.
• Clean the mass airflow sensor using MAF sensor cleaner.
• Check the throttle body for carbon buildup; clean if necessary using throttle body cleaner.
• Reassemble the air intake duct and ensure all connections are secure.

6. Vacuum Leak Inspection

• Visually inspect vacuum lines for cracks or disconnections.
• Use a smoke machine or propane to identify leaks in the intake system.
• Replace any damaged vacuum lines or gaskets as necessary.