my Toyota Highlander XU70 (2020-Present) has a check engine light and poor acceleration

Solution

1. Preparation

• Gather all tools and parts required for the repair.
• Disconnect the vehicle battery to ensure safety during the work.

2. Address Diagnostic Codes

• Sub-step 1: Based on the error codes retrieved, research and identify the specific components involved (e.g., O2 sensors, MAF sensor, etc.).
• Sub-step 2: Replace faulty components as indicated by the diagnostics.

3. Clean or Replace Throttle Body

• Sub-step 1: Remove the engine cover (if applicable) using a socket set.
• Sub-step 2: Disconnect the throttle body connector and any vacuum lines.
• Sub-step 3: Unscrew the throttle body from the intake manifold.
• Sub-step 4: Clean the throttle body using throttle body cleaner and a soft cloth. If damaged, replace it with a new one.
• Tools Required: Throttle body cleaner, socket set, soft cloth.

4. Inspect and Clean MAF Sensor

• Sub-step 1: Locate and remove the MAF sensor from the air intake duct.
• Sub-step 2: Clean the MAF sensor using specialized MAF cleaner; allow it to dry completely.
• Sub-step 3: Reinstall the MAF sensor and ensure all connections are secure.

5. Check and Adjust Fuel System

• Sub-step 1: If fuel pressure is low, replace the fuel filter and inspect the fuel pump.
• Sub-step 2: Ensure fuel injectors are clean and functioning; clean or replace as necessary.