why does my Toyota Corolla E170 (2013-2019) check engine light keep coming on?

Diagnose and fix the check engine light issue in your Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to ensure safety while working on electrical components.

2. Address Fault Codes

• Use the OBD-II scanner to read and document the error codes.
• Research codes to determine the specific components needing attention (e.g., P0130 for O2 sensor issue).

3. Inspect and Replace Components

• Gas Cap:

  • Check for cracks or damage.
  • Replace with a new gas cap if needed.

• Air Filter:

  • Remove the air filter housing cover using a socket set.
  • Replace the air filter with a new one if dirty or clogged.

• Ignition System:

  • Remove the ignition coil using a socket set.
  • Inspect the spark plug for wear; replace if necessary (Torque to manufacturer's specifications, typically 13-16 ft-lbs).
  • Reinstall the ignition coil and ensure proper connections.

4. Exhaust Inspection

• Inspect exhaust system visually for any leaks or damage.
• Use an exhaust leak detection tool if necessary.
• Repair or replace any damaged components (e.g., exhaust manifold, catalytic converter).

5. Clear Codes and Test

• Reconnect the battery.
• Use the OBD-II scanner to clear the error codes.
• Start the engine and allow it to reach operating temperature.