why is my Honda Civic 9th Generation (2012-2015) stalling at traffic lights

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Clean the Throttle Body

• Remove the air intake duct connected to the throttle body.
• Use throttle body cleaner and a clean cloth to remove carbon buildup from the throttle plate and surrounding areas.
• Reattach the air intake duct securely.

3. Test and Clean the Idle Air Control Valve (IAC)

• Locate the IAC valve on the throttle body.
• Disconnect the electrical connector from the IAC.
• Remove the IAC using a socket set.
• Clean the IAC valve with an appropriate cleaner and inspect for wear.
• Reinstall the IAC and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "On" position (without starting the engine) and check that the pressure meets the manufacturer specifications (typically between 30-45 psi for Honda Civics).
• If pressure is low, inspect the fuel pump and fuel filter for clogs or failures.

5. Inspect the Battery and Charging System

• Use a multimeter to check battery voltage (should be around 12.6 volts when fully charged).
• Start the vehicle and check the alternator output (should be between 13.7 to 14.7 volts).
• If readings are outside these values, consider replacing the battery or alternator.