how to fix P0306 code in Toyota Tacoma N300 (2016-Present)

Learn how to diagnose and fix P0306 cylinder 6 misfire in Toyota Tacoma N300. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the ignition coil on cylinder 6 by unbolting it and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and inspect it for wear or damage.
• If damaged, replace the spark plug with a new one, ensuring it is gapped correctly according to manufacturer specifications.
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• If the spark plug is in good condition, test the ignition coil using a multimeter for proper resistance (check the manufacturer specifications).
• If the coil is faulty, replace it with a new one.
• Reinstall the ignition coil securely.

4. Fuel Injector Cleaning/Replacement

• Tools Required: Fuel injector cleaning kit (if cleaning), socket set
• Remove the fuel injector for cylinder 6 by disconnecting the electrical connector and unbolting it from the intake manifold.
• Clean the injector using a fuel injector cleaning kit or replace it with a new injector if cleaning does not resolve the issue.
• Reinstall the injector and reconnect the electrical connector.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
• Use a smoke machine to detect leaks in the intake system, or spray carburetor cleaner around the intake manifold and listen for changes in engine RPM.
• Repair any identified leaks by replacing gaskets or hoses.

6. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and observe for any misfire codes or symptoms.
• Clear any error codes with the OBD-II scanner.