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

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable using a socket set.
• Remove the ignition coil by unscrewing the retaining bolts (usually 10mm).
• Disconnect the electrical connector from the ignition coil.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace with a new spark plug (OEM recommended gap: 0.044 inches).
• Reinstall the spark plug and torque to manufacturer specifications (typically 13 lb-ft).

3. Test and Replace Ignition Coil

• Test the ignition coil using a multimeter to measure primary and secondary resistance according to manufacturer specifications.
• If the coil is faulty, remove it from the engine.
• Install the new ignition coil and reconnect the electrical connector.
• Reinstall the ignition coil retaining bolts and torque them to the manufacturer specification (typically 7 lb-ft).

4. Check and Clean Fuel Injector

• Remove the fuel rail if necessary to access the injector for cylinder 1.
• Disconnect the fuel injector connector and remove the retaining clip.
• Carefully pull the injector out of the rail.
• Inspect the injector for clogs or damage; clean using fuel injector cleaner or replace if necessary.
• Reinstall the injector and reattach the fuel rail.

5. Compression Test (if needed)

• Remove the spark plug from cylinder 1.
• Insert a compression tester into the spark plug hole.
• Crank the engine for several seconds and record the compression reading.
• Compare against manufacturer specifications (typically around 180 psi).
• If compression is low, further diagnostics may be required to check for valve or head gasket issues.