how to fix P0171 code in Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Check all hoses and connections in the air intake system for cracks or loose fittings.
• Tighten any loose clamps and replace damaged hoses.
• If any leaks are found, replace the affected parts.

3. Fuel System Check

• Tools Required: Fuel pressure gauge, wrench.
• Connect the fuel pressure gauge to the fuel rail.
• Start the vehicle and check the fuel pressure; it should be within the manufacturer's specifications (typically around 50-60 psi).
• If the pressure is low, inspect the fuel pump, filter, and lines for clogs or failures.
• Replace any failing components as needed.

4. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner and a screwdriver.
• Remove the MAF sensor from the intake.
• Clean the sensor using MAF cleaner; do not touch the sensor element.
• Reinstall the MAF sensor and ensure it is securely fastened.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaning kit (if needed).
• Check fuel injectors for leaks and proper spray pattern.
• If clogged, clean the injectors using an injector cleaning kit or replace injectors if they are damaged.

6. Oxygen Sensor Check

• Tools Required: Multimeter or OBD-II scanner.
• Check the oxygen sensor's voltage output while the engine is running.
• If the output is out of specification, replace the oxygen sensor.