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

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, fuel pressure gauge, basic hand tools, cleaning solvent, safety gloves, safety goggles.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all air intake hoses for cracks or loose connections.
  2. Tighten any loose clamps or replace damaged hoses.
  3. Use a cleaning solvent to clean the MAF sensor gently.
  4. Reinstall the MAF sensor and ensure all connections are secure.

3. Test and Repair Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Start the engine and observe the fuel pressure reading. It should be within the manufacturer’s specifications (typically around 30-40 psi).
  3. If low, check the fuel pump operation and replace if necessary.
  4. Inspect fuel injectors for leaks or clogs using a noid light or by performing a resistance test with a multimeter.
  5. Replace any faulty injectors as needed.

4. Check Engine Coolant Temperature Sensor

• Sub-steps:
  1. Locate the engine coolant temperature sensor.
  2. Disconnect the wiring harness and use a multimeter to test the sensor's resistance against specifications.
  3. If the readings are outside of specification, replace the coolant temperature sensor.

5. Final Steps

• Reconnect the negative battery terminal.
• Clear the P0171 code using the OBD-II scanner.
• Start the engine and allow it to reach operating temperature.