my Honda Civic 10th Generation (2016-2021) won't start after filling gas

Solution

1. Preparation

• Tools Required: OBD-II scanner, fuel pressure gauge, multimeter, socket set, screwdriver set, safety glasses, and gloves.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Inspect Fuel System

• Fuel Pump Relay and Fuse:

  1. Locate the fuse box and identify the fuel pump relay and fuse.
  2. Remove the fuse and inspect for continuity using a multimeter; replace if faulty.
  3. Test the relay by swapping it with a similar relay in the fuse box.

• Fuel Pressure Check:

  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position (do not crank the engine) and check for pressure; it should be within manufacturer specifications (typically around 40-50 PSI).
  3. If pressure is low, proceed to check the fuel pump.

3. Fuel Pump Inspection

• Accessing the Fuel Pump:

  1. If the fuel pump is suspected to be faulty, access it by removing the rear seat or trunk panel (depending on model).
  2. Disconnect the wiring harness and fuel lines cautiously.

• Fuel Pump Testing:

  1. Using a multimeter, check for voltage at the pump connector while someone turns the key to the "ON" position.
  2. If voltage is present and the pump does not activate, replace the fuel pump.
  3. If voltage is absent, trace back to the relay and wiring for potential faults.

4. Reassemble and Connect

1. Reinstall the fuel pump, ensuring all connections are secure.
2. Reattach the rear seat or trunk panel.
3. Reconnect the negative battery terminal.