how to fix P0301 code in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter
• Fuel injector cleaning kit (if needed)

2. Replace Ignition Coil

• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the bolt(s) securing the ignition coil to the engine.
• Pull the ignition coil out of the cylinder head.
• Install the new ignition coil by reversing the removal steps. Ensure it is seated properly and torque the bolts to the manufacturer’s specifications.

3. Replace Spark Plug

• Remove the ignition coil again (if not done in the previous step for access).
• Use a spark plug socket to carefully remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of wear or damage. Replace if necessary.
• Apply anti-seize compound to the threads of the new spark plug (if recommended).
• Install the new spark plug and torque it to the manufacturer’s specified value.

4. Perform Compression Test

• Reinstall the ignition coil (if removed).
• Remove the fuel pump relay to prevent fuel delivery during the test.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole and crank the engine for several seconds until the gauge stabilizes.
• Record the compression reading. Compare it to manufacturer specifications.
• Reinstall the spark plug and reconnect the fuel pump relay after testing.

5. Clean or Replace Fuel Injector

• If the injector is found to be clogged, remove it from the engine (may require removal of the intake manifold).
• Clean the injector using a fuel injector cleaning kit or replace it if cleaning does not resolve the issue.
• Reinstall the injector ensuring proper sealing and connections.