how to address Honda CR-V Fifth Generation (2017-2022) P0171 lean condition?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Replace any damaged hoses.
  3. Check the intake manifold gasket for leaks and replace if necessary.
  4. Ensure the air filter is clean and replace if it is dirty.

3. Test and Replace Fuel System Components

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail and turn the ignition on without starting the engine.
  2. Compare the reading to the manufacturer's fuel pressure specifications (typically 30-50 psi for CR-V).
  3. If the pressure is low, check the fuel pump relay and fuse.
  4. If necessary, replace the fuel pump or fuel filter.

4. Clean or Replace MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor connector.
  2. Remove the MAF sensor from the intake system.
  3. Spray MAF cleaner on the sensor element; do not touch it.
  4. Allow it to dry completely before reinstalling.
  5. Reconnect the MAF sensor and clear the codes with the OBD-II scanner.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the fuel injectors.
  2. Inspect the injectors for clogs; use a fuel injector cleaning kit if necessary.
  3. Replace any faulty injectors with new ones if cleaning does not resolve the issue.