my Skoda Octavia NFL (2020-Present) has rough idle and stalling issues what's wrong

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Clean the Throttle Body

• Remove the air intake duct connected to the throttle body.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and surrounding area.
• Ensure the throttle plate operates freely and does not stick.

3. Inspect and Replace Spark Plugs

• Remove the ignition coils from the spark plugs.
• Unscrew the spark plugs using a socket wrench.
• Inspect the spark plugs for signs of wear; replace if necessary with OEM parts.
• Reinstall the spark plugs and ignition coils, ensuring they are torqued to the manufacturer's specifications (usually around 15-20 Nm).

4. Check and Clean the MAF Sensor

• Disconnect the MAF sensor connector.
• Remove the MAF sensor from the air intake tube.
• Clean the MAF sensor gently using MAF sensor cleaner; do not touch the sensor element.
• Reinstall the MAF sensor and connector.

5. Verify Fuel Pressure

• Connect the fuel pressure gauge to the fuel rail test port.
• Turn the ignition to the "ON" position without starting the engine and check the pressure against the specifications (typically around 3.5 to 5 bar).
• If the pressure is low, inspect the fuel pump and fuel filter for issues.

6. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and check for smooth idle and proper operation.
• Monitor for any error codes that may reappear after repairs.