Toyota Tacoma N300 (2016-Present) P0301 code what does it mean

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shocks.
• Allow the engine to cool completely before starting any work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Disconnect the electrical connector.
  • Unbolt the ignition coil using the appropriate socket.
• Remove the spark plug:
  • Use a spark plug socket and ratchet to unscrew the spark plug.
• Inspect the spark plug for wear or damage. Replace if necessary:
  • Ensure the gap is set to manufacturer specifications (typically 0.043 inches for Toyota).
• Install the new spark plug, torque to manufacturer specifications (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect its electrical connector.

3. Test and Replace Ignition Coil (if needed)

• If the spark plug is in good condition, test the ignition coil:
  • Use an ohmmeter to check primary and secondary resistance.
• If the ignition coil is faulty, replace it:
  • Install the new coil and reattach the electrical connector.

4. Check Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Use a noid light to check for signal:
  • If the light does not flash, the injector may be faulty or there may be an issue with the wiring.
• If necessary, replace the fuel injector:
  • Remove the retaining clips and disconnect the fuel line if applicable.
  • Install the new injector and reconnect the lines and connectors.

5. Address Vacuum Leaks

• Check hoses and intake manifold gaskets for leaks around cylinder 1:
  • Use a smoke machine or carburetor cleaner to detect leaks.
• Replace any damaged hoses or gaskets as needed.