why does my Toyota Highlander Fourth Generation (2020-present) display a check engine light intermit...

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Allow the engine to cool down before starting any work.

2. Address Fault Codes

• Sub-step 1: Use the OBD-II scanner to retrieve error codes.
• Sub-step 2: Cross-reference the codes with a repair manual or database for specific issues.
• Sub-step 3: Follow the specific repair procedures indicated for the retrieved codes.

3. Inspect and Replace Components

• Sub-step 1: If the gas cap is faulty, replace it with a new one (ensure it matches OEM specifications).
• Sub-step 2: If wiring or connectors are damaged, repair or replace as necessary.
• Sub-step 3: Check and replace any faulty sensors (e.g., O2 sensors, MAF sensor) based on diagnostic results.

4. Reconnect Battery and Clear Codes

• Sub-step 1: Reconnect the negative battery terminal after repairs are completed.
• Sub-step 2: Clear any stored error codes using the OBD-II scanner.
• Sub-step 3: Conduct a test drive to ensure the check engine light does not re-illuminate.