how to fix Honda Accord Eleventh Generation (2023-present) P0171 code

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to prevent electrical shock.
• Allow the engine to cool before working on the intake system.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Hose clamp pliers, flashlight, spray bottle with soapy water.
• Inspect all vacuum hoses and connections in the air intake system.
• Use the soapy water method to detect leaks: spray suspected areas and observe for bubbling.
• Replace any damaged hoses or connections.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver.
• Locate the MAF sensor on the air intake duct.
• Disconnect the electrical connector and remove the sensor from the duct.
• Clean the MAF sensor using MAF cleaner and allow it to dry before reinstallation.
• If damaged, replace the sensor with a new one.

4. Check Fuel System Components

• Tools Required: Fuel pressure gauge, socket set.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position and check the fuel pressure against manufacturer specifications.
• If pressure is low, inspect the fuel pump and replace if necessary.
• If the fuel filter is clogged, replace it according to the manufacturer's guidelines.

5. Replace the ECT Sensor (if necessary)

• Tools Required: Socket set, coolant catch pan.
• Locate the ECT sensor, usually near the thermostat housing.
• Disconnect the electrical connector and remove the sensor.
• Install a new ECT sensor and reconnect the electrical connector.
• Refill any lost coolant and check for leaks.