how to fix P0171 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather tools and parts beforehand.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a flat surface and the engine is cool.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Sub-steps:
  1. Remove the air intake duct and inspect for cracks or loose connections.
  2. Check all vacuum hoses connected to the intake manifold for signs of wear or disconnection.
  3. Repair or replace any damaged hoses or ducts.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft brush
• Sub-steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the MAF sensor from the air intake assembly.
  3. Clean the MAF sensor gently with MAF cleaner or isopropyl alcohol. Do not touch the sensor wires.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Attach the fuel pressure gauge to the test port.
  3. Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading against the manufacturer's specifications (usually around 40-50 PSI for the Accord).
  4. If pressure is low, inspect the fuel pump and filter for issues.

5. Inspect and Clean Fuel Injectors

• Tools Required: Injector cleaner kit or professional cleaning service
• Sub-steps:
  1. Remove the fuel rail to access the injectors.
  2. Inspect the injectors for clogs and leaks.
  3. Clean the injectors using a cleaning kit or replace them if they are damaged.

6. Check and Replace Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket, ratchet
• Sub-steps:
  1. Locate the upstream and downstream oxygen sensors on the exhaust system.
  2. Disconnect the electrical connectors.
  3. Remove the sensors using the O2 sensor socket.
  4. Install new sensors and reconnect the electrical connectors.