how to fix P0301 code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

Tools Required:

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

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket. Inspect it for wear and replace it if necessary.
• Install the new spark plug, ensuring it is properly gapped according to manufacturer's specifications (typically between 0.043-0.047 inches).
• Reinstall the ignition coil, securing it with bolts and reconnecting the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

• If the ignition coil was damaged during inspection, replace it with a new one.
• Disconnect the battery again if you haven't already.
• Remove the faulty ignition coil and install the new one, ensuring it is properly seated.

4. Inspect Fuel Injector

• If no issues are found with the spark plug or ignition coil, check the fuel injector for cylinder 1.
• Remove the fuel rail if necessary to access the injector.
• Test the injector with a multimeter to ensure it has the correct resistance (typically around 12-16 ohms).
• If the injector is faulty, replace it and clean the fuel rail.

5. Compression Test

• If issues persist, perform a compression test on cylinder 1.
• If the compression is low, further investigation into valve seals, head gasket, or piston rings may be necessary.