how to fix P0171 code on my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Repair Air Leaks

• Step 1: Inspect all vacuum lines and hoses connected to the intake manifold for cracks or disconnections.
• Step 2: Replace any damaged hoses or reattach loose connections.
• Tools Required: Socket set, pliers.

3. Clean or Replace MAF Sensor

• Step 1: Disconnect the MAF sensor electrical connector.
• Step 2: Remove the MAF sensor from the air intake duct.
• Step 3: Clean the sensor with MAF cleaner or replace it if damaged.
• Tools Required: Torx or socket wrench, MAF cleaner.

4. Check Fuel Pressure

• Step 1: Connect a fuel pressure gauge to the fuel rail.
• Step 2: Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading.
• Step 3: If pressure is low, inspect the fuel pump and filter for issues.
• Tools Required: Fuel pressure gauge.

5. Inspect and Clean Fuel Injectors

• Step 1: Remove the fuel injector connectors.
• Step 2: Use a fuel injector cleaning kit to clean the injectors or replace them if necessary.
• Tools Required: Fuel injector cleaning kit, socket set.

6. Reset ECM

• Step 1: After completing repairs, reconnect the battery.
• Step 2: Use the OBD-II scanner to clear the P0171 code.
• Tools Required: OBD-II scanner.