why is my Toyota Corolla E140 (2006-2013) check engine light on

• •Check engine light illuminated
• •Engine running rough or misfiring
• •Decreased fuel efficiency
• •Unusual smells from the exhaust
• •Engine stalling or hesitation during acceleration
• •Increased emissions

1. 1Scan for error codes using an OBD-II scanner to identify specific issues.
2. 2Inspect gas cap for proper sealing and signs of damage.
3. 3Check engine oil level and condition, ensuring it meets specifications.
4. 4Inspect air filter for dirt or blockages that could affect airflow.
5. 5Examine spark plugs for wear or deposits that could cause misfiring.
6. 6Test the battery voltage and connections to ensure proper power supply.

After completing the repair, verify that the issue has been resolved:

• ✓Test the affected component to ensure it functions correctly
• ✓Check for any error codes or warning lights
• ✓Monitor the vehicle for a few days to ensure the issue does not recur

To prevent this issue from occurring again:

• •Follow the manufacturer's recommended maintenance schedule
• •Address warning signs early before they develop into major issues
• •Use quality parts and fluids recommended for your vehicle
• •Keep detailed records of all repairs and maintenance

• •OBD-II scanner
• •Socket set
• •Torque wrench
• •Multimeter
• •Basic hand tools

• •New gas cap (if defective)
• •New air filter (if dirty)
• •New spark plugs (if worn)