my Toyota Highlander XU70 (2020-Present) hesitates when I accelerate what should I check

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid electrical hazards.
• Allow the engine to cool before starting work.

2. Clean the Throttle Body

• Remove the air intake duct to access the throttle body.
• Use throttle body cleaner and a soft cloth to clean the inside of the throttle body.
• Ensure the throttle plate moves freely and is not sticking.
• Reattach the air intake duct securely.

3. Replace Air Filter

• Open the air filter housing by removing the screws or clips.
• Remove the old air filter and inspect the housing for debris.
• Install a new air filter that meets OEM specifications.
• Reassemble the air filter housing.

4. Test and Replace Spark Plugs

• Remove the ignition coils carefully.
• Unscrew the spark plugs using a spark plug socket.
• Inspect the spark plugs for wear and replace them if they show signs of damage or excessive wear.
• Torque new spark plugs to the manufacturer's specifications (typically 12-15 ft-lbs).

5. Check and Replace Ignition Coils (if necessary)

• Visually inspect the ignition coils for cracks or damage.
• Use a multimeter to test for resistance as per the specifications in the service manual.
• Replace any faulty ignition coils with OEM parts.

6. Reconnect Battery and Clear Codes

• Reconnect the battery.
• Use the OBD-II scanner to clear any error codes.
• Start the engine and ensure it runs smoothly.