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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal.
• Allow the engine to cool.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil by unscrewing the retaining bolts and gently pulling it off.
• Remove the spark plug using the spark plug socket.
• Inspect the old spark plug for wear. If damaged, install a new spark plug with the correct gap (typically 0.043 inches for most Toyota models).
• Torque the spark plug to the manufacturer’s specifications (approximately 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• Test the ignition coil using a multimeter; check for resistance according to the specifications in the service manual.
• If the coil is faulty, replace it with a new one.
• Reinstall the ignition coil, ensuring it is seated properly and secure it with the retaining bolts.

4. Test Fuel Injector

• Tools Required: Fuel injector tester
• Disconnect the fuel injector connector.
• Use a fuel injector tester to check for proper operation.
• If the injector is faulty, replace it with a new one, ensuring proper alignment and securing it back.

5. Perform Compression Test

• Tools Required: Compression gauge
• Remove the spark plug and insert the compression gauge into the cylinder.
• Crank the engine and record the compression reading. Compare it to the manufacturer’s specifications (typically around 180 psi).
• If compression is low, further investigation into engine internals may be necessary.