my Honda Civic 11th Generation (2022-Present) won't start after sitting for a few days

Solution

1. Preparation

• Gather tools and parts. Ensure the vehicle is parked on a level surface and the engine is off.
• Tools Required: Multimeter, socket set, OBD-II scanner, wire brush (for cleaning terminals), jumper cables (if needed).

2. Battery Inspection and Replacement

• Step 1: Disconnect the negative terminal of the battery to ensure safety.
• Step 2: Clean the battery terminals with a wire brush to remove any corrosion.
• Step 3: Reconnect the terminals securely and check the voltage again.
• Step 4: If the battery voltage is below 12.4 volts, charge or replace the battery as needed.

3. Starter and Ignition System Check

• Step 1: If the battery is good, perform a starter test by connecting jumper cables to a known good battery.
• Step 2: If the starter engages and the vehicle starts, the original battery is likely the issue; if not, replace the starter motor.
• Step 3: Inspect ignition components, including spark plugs and ignition coils, and replace any faulty parts.

4. Fuel System Check

• Step 1: If the engine still does not start, check the fuel pump relay and fuses.
• Step 2: If the relay and fuses are intact, replace the fuel pump if it fails to prime when the ignition is turned on.