how to fix the P0301 misfire code on my Honda Pilot Third Generation (2016-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Replace Spark Plug

• Remove the engine cover if necessary.
• Use a socket wrench to remove the spark plug from cylinder 1.
• Inspect the old spark plug; if it is worn or damaged, replace it with a new one.
• Set the gap of the new spark plug according to manufacturer specifications (typically around 0.043 inches).
• Install the new spark plug and tighten it to the manufacturer's torque specification (usually around 13 lb-ft).

3. Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the bolt securing the ignition coil using a socket wrench.
• Carefully pull out the ignition coil.
• Install the new ignition coil by reversing the removal process, ensuring it is seated correctly and the connector is secured.

4. Check Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the resistance of the injector (should be within manufacturer’s specified range).
• If faulty, remove the injector using a fuel line disconnect tool and install a new injector, ensuring to lubricate O-rings with clean engine oil before installation.

5. Reassemble and Reconnect

• Reconnect any components removed during the repair (engine cover, battery terminal).
• Clear the P0301 code using an OBD-II scanner.