how to fix the P0301 code in my Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before beginning work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector and remove the coil.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for damage or excessive wear. Replace if necessary.
• Install a new spark plug and torque it to the manufacturer’s specifications (typically 13 lb-ft).
• Reinstall the ignition coil and connector.

3. Test and Replace Ignition Coil

• Tools Required: Multimeter (if testing), socket set.
• If the ignition coil was found faulty during diagnostics, replace it.
• Remove the faulty ignition coil from cylinder 1.
• Install a new ignition coil and ensure it is seated properly.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (if cleaning), socket set.
• Disconnect the fuel injector connector and remove the injector from cylinder 1.
• Inspect the injector for clogs or damage. Clean or replace as necessary.
• Reinstall the fuel injector and connector securely.

5. Verify Compression

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1 and install the compression tester.
• Crank the engine and record the compression reading.
• If the compression is below the manufacturer’s specification, further engine diagnosis is needed.