why does my Toyota Camry XV40 engine light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.

2. Addressing Error Codes

• Use the OBD-II scanner to retrieve and interpret the error codes.
• Document the codes for reference.

3. Replace Faulty Components

• If the error code indicates a faulty O2 sensor:

  • Locate the O2 sensor (usually near the exhaust manifold).
  • Disconnect the electrical connector.
  • Use a wrench to remove the old O2 sensor.
  • Install the new O2 sensor and reconnect the electrical connector.

• If the code indicates a misfire:

  • Check spark plugs and ignition coils.
  • Replace any faulty spark plugs or coils.

4. Clear Codes and Test

• Reconnect the battery.
• Use the OBD-II scanner to clear the error codes.
• Test drive the vehicle to see if the engine light reappears.