why does my Toyota Camry XV70 (2018-2024) check engine light keep coming on

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, torque wrench.
• Disconnect the battery to ensure safety while working on electrical components.
• Allow the engine to cool down before starting repairs.

2. Addressing Error Codes

• If the OBD-II scanner reveals specific error codes, research the meaning of each code.
• For example, if a P0420 code is detected (catalytic converter efficiency), proceed with testing the converter.

3. Inspect and Replace Components

• Gas Cap:
  • Check for damage or improper sealing.
  • Replace with a new gas cap if faulty.
• Oxygen Sensor:
  • Disconnect the sensor wiring harness.
  • Remove the sensor using a socket and replace with a new one, ensuring it is torqued to manufacturer specifications (typically around 30 Nm).
• Air Filter:
  • Remove the air filter assembly.
  • Replace with a new filter and ensure proper seating.

4. Exhaust System Check

• Inspect exhaust pipes and catalytic converter for leaks.
• If leaks are found, replace damaged sections or the entire exhaust component as necessary.

5. Final Assembly

• Reconnect any components that were removed during inspection.
• Reconnect the battery.
• Clear any stored trouble codes using the OBD-II scanner.