how to fix a P0301 code on Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool before starting work.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil and spark plug from cylinder 1.
• Inspect the spark plug for signs of wear, such as deposits or cracks.
• If damaged, replace the spark plug with a new one, ensuring it meets OEM specifications.
• Torque the new spark plug to the manufacturer’s specification (typically around 13 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, multimeter (for testing).
• Test the ignition coil using a multimeter to check for proper resistance.
• If the coil is faulty, remove it from the cylinder head.
• Install a new ignition coil and ensure it is properly seated.

4. Inspect Fuel Injector

• Tools Required: Fuel injector cleaner, multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the injector’s resistance; it should match OEM specifications.
• If the injector is defective, replace it with a new one.
• Reconnect the fuel injector connector and ensure a secure fit.

5. Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1.
• Insert the compression gauge into the spark plug hole and crank the engine to take a reading.
• Compare the compression reading with OEM specifications (typically around 180 psi).
• If the compression is low, further diagnostic work is needed for potential engine repairs.