my Toyota RAV4 XA40 (2013-2018) check engine light is on what does it mean

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool before beginning work.

2. Address Diagnostic Codes

• Use the OBD-II scanner to retrieve and document error codes.
• Research each code to determine the related component and necessary repairs.

3. Inspect and Replace Components

• Gas Cap: If the gas cap is found to be faulty, replace it with a new one.
• Air Filter: If the air filter is dirty, replace it with a new, manufacturer-recommended filter.
• Spark Plugs: If misfire codes are present, inspect and replace spark plugs if worn.
• O2 Sensors: If oxygen sensor codes are present, test each sensor and replace any faulty ones.

4. Clear Codes and Test

• After repairs, reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the check engine light codes.
• Start the engine and allow it to reach operating temperature.