why does my Volvo XC60 Second Generation (2018-2024) check engine light keep coming on

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Addressing Fault Codes

• Sub-step 1: Review the OBD-II codes retrieved from the scanner.
• Sub-step 2: Research the codes to determine the potential causes and affected components.
• Sub-step 3: Proceed to replace or repair the identified components based on the fault codes (e.g., oxygen sensors, mass airflow sensor, etc.).

3. Inspect and Replace Components

• Sub-step 1: If the gas cap is damaged, replace it with a new one.
• Sub-step 2: If vacuum leaks are found, replace cracked hoses or reroute disconnected hoses.
• Sub-step 3: Replace the air filter if it is clogged or excessively dirty.
• Sub-step 4: If a faulty sensor (e.g., O2 sensor) is diagnosed, remove the old sensor and install a new one, following torque specifications.

4. Reset the Check Engine Light

• Sub-step 1: Reconnect the negative battery terminal.
• Sub-step 2: Use the OBD-II scanner to clear the error codes.
• Sub-step 3: Start the engine and observe if the check engine light remains off.