how to fix Honda Accord 10th Generation (2018-2022) with P0171 code

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative terminal of the battery for safety.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum lines connected to the intake manifold.
  • Use a smoke machine or carburetor cleaner to identify any leaks.
  • Replace any damaged hoses or seals found during inspection.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF cleaner spray
• Sub-steps:
  • Locate the MAF sensor on the air intake duct.
  • Disconnect the electrical connector from the MAF sensor.
  • Remove the MAF sensor from the duct (usually held by screws or clamps).
  • Clean the sensor using MAF cleaner spray and allow it to dry.
  • Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Repair Fuel System

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position (do not start) to check fuel pressure.
  • Compare the reading with the manufacturer’s specifications (usually between 40-50 psi).
  • If pressure is low, check the fuel pump and fuel filter for issues; replace as necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  • Remove the fuel rail to access the injectors.
  • Inspect injectors for clogs or leaks.
  • Clean the injectors using a fuel injector cleaning kit or replace them if damaged.

6. Reassemble and Reset

• Reinstall all components removed during the repair process.
• Reconnect the negative battery terminal.
• Clear the error code using an OBD-II scanner.