how to fix P0301 code in Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool if it has been running.

2. Inspect and Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Remove the spark plug wire or ignition coil from cylinder 1.
• Use a socket wrench to unscrew the spark plug from cylinder 1.
• Inspect the spark plug for wear; if it shows signs of fouling or damage, replace it with a new one.
• Torque the new spark plug to the manufacturer’s specifications (typically around 13-15 lb-ft).
• Reattach the ignition coil or spark plug wire.

3. Test and Replace Ignition Coil

• If the spark plug is fine, remove the ignition coil from cylinder 1.
• Test the ignition coil with a multimeter to ensure it operates within specifications (refer to the service manual for specific resistance values).
• If the coil is defective, replace it with a new one, ensuring it is seated properly.

4. Inspect and Clean Fuel Injector

• If the ignition components are functioning, disconnect the fuel injector connector for cylinder 1.
• Perform a resistance test on the injector with a multimeter to check for proper operation.
• If the fuel injector is faulty, replace it.
• If it’s operational but clogged, use fuel injector cleaner as per the instructions or replace the injector if cleaning doesn’t resolve the issue.

5. Compression Test

• If misfire persists, perform a compression test on cylinder 1.
• If the compression is below specification (typically around 180 psi), there may be internal engine issues such as a blown head gasket or valve problems that need further investigation.