why does my Toyota Tacoma N300 (2016-Present) check engine light keep coming on?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is turned off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Address Fault Codes

• Reconnect the OBD-II scanner and note the trouble codes.
• Research each code to determine the required repair actions.

3. Check and Replace Gas Cap

• Inspect the gas cap for cracks or wear.
• If damaged, replace the gas cap with a new OEM or equivalent part.
• Tighten the gas cap until it clicks to ensure a proper seal.

4. Inspect and Replace Air Filter

• Remove the air filter cover using a socket set.
• Take out the air filter and inspect for dirt and damage.
• If the filter is dirty, replace it with a new one and reassemble the cover.

5. Fuel System Inspection

• Locate the fuel injectors and inspect for leaks or clogs.
• Use a fuel pressure gauge to check fuel pump operation; replace if pressure is outside specifications.
• Clean or replace injectors if they are found to be faulty.

6. Clear Codes and Verify

• Use the OBD-II scanner to clear the error codes after repairs are completed.
• Reconnect the negative battery terminal.