how to fix P0301 cylinder 1 misfire code on Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent any electrical issues while working on the ignition system.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the old spark plug using a spark plug socket, inspecting it for wear or fouling.
• Install the new spark plug, ensuring it is gapped correctly according to manufacturer specifications (typically 0.043 inches for Tacoma).
• Torque the spark plug to the manufacturer's specification (typically around 13 lb-ft).

3. Replace Ignition Coil

• Tools Required: Socket set.
• If the ignition coil appears damaged or its resistance is out of spec, replace it with a new one.
• Install the new ignition coil onto the spark plug, securing it with the retaining bolts and reconnecting the electrical connector.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaner, basic hand tools.
• If the fuel injector is clogged, use a fuel injector cleaner to clear it. If it is faulty, remove the injector by detaching the fuel rail and replacing it with a new one.
• Ensure all seals are replaced and reattach the fuel rail securely.

5. Reconnect Battery and Test

• Reconnect the battery and clear the error codes using the OBD-II scanner.
• Start the engine and monitor for any persistent misfire codes or symptoms.