how to fix P0171 lean code in Honda CR-V Sixth Generation (2023-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during the repair.

2. Inspect and Repair Air Intake System

• Check for Leaks:
  • Visually inspect all air intake hoses and connections.
  • Use a smoke machine or carburetor cleaner to detect leaks.
• Repair Leaks:
  • Replace any damaged hoses or clamps as necessary.

3. Clean or Replace MAF Sensor

• Remove MAF Sensor:
  • Disconnect the electrical connector and remove the screws securing the MAF sensor.
• Clean or Replace:
  • If dirty, spray MAF cleaner onto the sensor element and let it dry. If damaged, replace the MAF sensor with a new one.

4. Check and Repair Fuel System

• Check Fuel Pressure:
  • Connect the fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position (do not start) and check the pressure.
  • Compare the reading to manufacturer specifications. If low, inspect the fuel pump and filter for issues.
• Inspect Fuel Injectors:
  • Remove and clean the fuel injectors using an ultrasonic cleaner if clogged. Replace if necessary.

5. Replace Engine Coolant Temperature Sensor (if needed)

• Remove Sensor:
  • Disconnect the electrical connector and unscrew the sensor from the engine.
• Install New Sensor:
  • Apply thread sealant to the new sensor and install it, then reconnect the electrical connector.